Red Shirt. I've tried, but the throwaways tend to become the most long-lived.
Half-Elves. Too emo. I can play selfish pricks, but I can't play people that emotionally obsessed with themselves. Also the mood swings. Yeah. Just can't. Appreciate the people who can! I think i've played either 0 or 1 half-elf in total.
Magickers. I'm alright with them, but the temptation to endlessly spam-cast to branch second and third tier spells is overwhelming for me. I've found this severely lessened by having the sub-guilds in place, though i've only tried a couple. I also find I make retarded mistakes on every Magicker i've played. Like Bantos the Oashi Krathi, who drank cleaning fluid. Just stupid stuff not even typically related to magick, just happens to happen to my magickers. I don't think i've had one live past 4 or 5 days played, if that.
Rangers. Took me several Rangers to finally 'get it' when I played Gazel of Kadius. After i've played him, I sort of got/get how to be a ranger, but now Tuluk's closed and i'd be confused again.