1. Interface
Yes, this is bad enough it's shunted LAG into second place. (Lag for me has been a little better over summer, though game's been down a lot again this week). At least the LAG is hard to deal with.
The interface is dreadful. Granted, this is a free game that's written by people in their spare time, so I'll rephrase that and say it's fairly dreadful.
I've mentioned a great long list of the problems at least twice before so won't again, but as an example, the most simple and annoying one is probably this: when you leave an area, you have first to cancel the project you're working on. Why can't the game just cancel it for you? An extra click for absolutely no reason other than poor design.
I could probably split this one into ten different sub-categories of poor design, and each one on its own would make my top ten. So to give a chance for other things to make an entrance, I've lumped them all as number 1.
2. Lag
Difficult to play when you can't access the pages. All the more annoying when you get halfway through something and then it freezes - which puts you off doing anything in case you get stuck halfway through it. Twinned with the interface design causing you to need twice as many clicks as should be necessary, this is still a major problem - both when it occurs, and when you are put off playing in case it does.
---Those two are by far the worst. Here are the rest in rough order of most annoying down to least annoying:---
3. Lack of physical description.
I have a character who is fat, sweaty, relatively ugly and has a coarse voice. But I can't keep putting that info in emotes every time someone new comes into town. So it's frustrating to roleplay when someone comes in and says she's looking beautiful and starts flirting with her. Beauty is in the eye of the beholder and all that, but I don't think that's the issue here, it's that their idea of my character's appearance is very different from mine.
4. People/businesses who do everything themselves
I can understand some characters having a sort of DIY personality. They want to do everything themselves. But this seems to cover most people. It's remarkably hard to run any business of any sort in Cantr because there's almost always someone else who will do the same thing.
Take manufaturing tools as an example. Most popular tools can be manufactured by anyone (stone hammer, bone knife, bone needle, stone axe) and in the case of all but the stone axe, provide every benefit of their iron counterparts other than a bit more inventory space taken up. Many more popularish tools (axe, pickaxe, shovel) can be made by pretty much anyone with only a few tools/machines. There are very few tools which require specialist machining/tooling, and none which require specialist skills.
My characters have come across so many businesses that will make anything from bed linen to ships, from steel battleaxes to dirt bikes, from diamond rings to apple pies. So instead of having a diversity of trades operating in the town, you get one rich company that makes everything and employs everyone. And that rich company then never needs to trade with others, they just make everything in-house.
My tailor could, with relative ease, build a smelting furnace, an anvil and start manufacturing weapons. Which is silly, because she's a tailor, so she doesn't. But elsewhere in the same town, other people are members of large companies that can do all their own tailoring. And my character who wants to make a sail for his ship can make his own far more quickly and easily than by using the town's ship supplies shop, because he can make it almost as quickly, and cuts out all the discussion over payment and requirements and so on that can take days.
I'd love to see it that you could gain mastery in a skill in some way, that would allow you to make items that you couldn't otherwise make. So only an expert/master tailor can make diamond jewelry. Only an expert toolsmith can make a steel flatter. Only an master shipbuilder can make a galleon. Then you can choose - make all your own average stuff, or trade with/employ people who have specialist skills that they can actually charge for and be needed for, and get good stuff.
5. The anonymity.
Other online games I've played, I've made friends IRL from. From Cantr, I've been playing for a couple of years and I know pretty much no-one. This is due to the fact that you never know who you're playing with, you only know the characters. I do think that's a shame, even though I realise the reasons it's done. I play another game which is roleplaying and you can look up the players of the characters and give them occasional medals to say that you think they roleplay well, or make the game fun, or you can trust them to play well within the game. I think that's much nicer than in Cantr when you only know people from the forum, if you choose to come to it. And people are often different on a forum to how they act in-game, I find.
6. Knowing that if I don't log in for a while, I'm letting other players down.
Not much I can do about that. But it annoys me that, for example, in the last week I've hardly been able to log in due to either lag or apathy, yet I know that other players are having a crapper time because I'm not there to communicate with their characters.
7. Towns where the first rules drawn up are "No hurting people, no stealing, no going in and out of buildings".
Fair enough if they've come from another town where they're used to those rules, but as often as not it just seems hat people put up those rules more due to OOC beliefs than IC beliefs. I'm sure sometimes the "no stealing" rule is written by town leaders who've never even seen anything stolen and probably have little idea what theft even means. And the "no hurting people" rule written by people who've never seen violence, let along violence that's done them any harm.
8. When you spawn five people in a row in the same area of the same continent.
I spawned 5 characters in a row in and around Olipfirovash. Given that the first was one who trades around those towns, I had to kill/emigrate all the others to avoid CRBs, and anyway, I created more characters to see more bits of Cantr, not the same bit from many angles.
9. People who don't think when they roleplay.
That can be anything from people who talk in txt msg speak, to people who see you talk about "Cathy" and say "No, it's Kathy" as if they somehow knew which letter you spoke, or any one of numerous other times people just write something daft that's difficult to roleplay to in return as a result.
Fortunately this is actually not anywhere near as common as I would have expected
10. People who kill your character with absolutely no roleplay to explain why they're doing it.
I logged in a while ago to find one of my characters dead. He'd travelled along a road, and as soon as he got there, was battered to death. No explanation IC or OOC as to why. Which is a bit rubbish really.