[quote=Jig]
I know a lot of people do this so I'm worried I might ruffle feathers, but...People who have a stock selection of characters that they use for all the RPs they play in. If I'm GMing an RP, I want people to come up with characters to fit the RP, not crowbar their old ones into the setting.To me, this practise doesn't say "I really like this RP's concept and want to embrace and be a part of the world" so much as "I really like this thing I've already worked on and now I get to use it again", which isn't really very inspiring.I'm sure plenty of people see it very differently, but that's my reaction to it.
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I have a mixed opinion on this. On one hand, I wholeheartedly agree it's a bad thing when people take a character they played once, possibly in a similar setting, and plonk it in a new RP with no changes whatsoever, commonly ignoring the fact their backstory is wildly contradictory to the backstory of the RP. I've met more than a few people that have done this. It reeks of inconsideration >.>

Of course, if they did in fact take care to recraft anything about the character that doesn't fit the new RP and effectively work them in, I don't really see the problem. Heck, unless they outright tell you the character is one they've played before, I can't imagine how you would be able to tell XD

In general, any and all characters ought to fit the setting the GM has created. So long as it doesn't stand out as completely out of place, it shouldn't be a problem imo.