With the disclaimer that good writing can redeem any bad archetype/trait, and vice versa:
Like:
- Characters who are earnest. The type who, on top of usually speaking their mind, also encourage other characters to speak theirs.
- Characters who live by a personal code. Regardless of whether that code isn't something necessarily good, or if they eventually grow away from it, it's just a nice dynamic to see a character interact and struggle with keeping strong, personal values.
- Characters who are past their prime: old, injured or struggling to keep up with modern times.
- The "wandering swordsman/gunman" and "Inspector Marlowe" archetype.
- Characters who plow through traps, magic, special powers, special items and clever strategies through good old BRUTE STRENGTH. I think I prefer this more as a supporting character trait, though, as it often becomes an asspull if the main character keeps pulling it off.
Dislike:
- Glasses-adjusting masterminds. I don't mind these guys in a supporting or antagonist role, but I usually find them absolutely grating as main characters.
- Main character is a loveable, selfish asshole who never gets his comeuppance. I've seen this archetype pulled off well almost exclusively with Rance, and very little else.
- Main character is a proud member of some organized crime cell, like the Yakuza. This just rubs me the wrong way, and usually is linked to a whole number of cliches and plots that I really despise.
- Quirky but """"loveable"""" engineer / hacker. I believe this is already one of the worst archetypes of any traditional group dynamic. Turning them into main characters warrants an almost instant drop for me.