Re: Can I reuse a character?
That's kind of the crux of the whole issue. Characters can be recreated, or the same character name and personality can be given to a character with different stats, or the same stats can have a new name and backstory slapped on them.
I don't run games, in general...it's just never held that much appeal for me...but I think it's more a question of "Does this character fit the game?" than "Is this a brand-new character?" If everyone else is starting new and someone wants to import their veteran character, the character doesn't fit the game. As mentioned earlier, don't try to shoehorn a hacker into a high-fantasy epic (unless that's exactly what the GM wants). And if you're recycling a character, don't have its behaviors based on what happened in other games, let the character start from the same general baseline as it's other iteration(s), and grow organically from there, based on what happens to it in THIS game.
Not everyone can do that, I know, and I get why some GMs decide to spare themselves the headache of having to referee whether this character quirk (which may or may not be causing trouble in the group) is a natural result of what's happened or a carryover from another iteration of the character, and decide to therefore have everyone start from scratch. I haven't joined a new game in a while, but the vast majority of games I've joined have seen me create a new character, just because the new game was different than what I've done in the past. There's only one game I've joined during my RPOL tenure where I reused a character (at least, one game I can think of), and that was actually a reboot of an old character, going back to base stats and experiences, and starting from there (there may have been one or two other short-lived attempts where I had created a character for a game that died shortly after I joined, and having found another, similar game and not having done anything to speak of with the character, I just used it in the new game...it was still a new character, after all, and there was no "baggage" to worry about from the last game...but none of those attempts lasted long enough to make any lasting memory of said character.)