Oddly enough, I don't have any "long-lasting" characters. Though, that's mostly due to me having so many different character ideas kicking around that I always have something new I want to try - and the setting of whatever I'm RPing in (or even just the available classes and feats) can generate more new ideas.
So, the length of the character's "survival" tends to just depend on how long I have been playing that particular game or system. So, by that logic - even though I never really RPed with him - the longest-lived character is probably my Night Elf Hunter in WoW. I created him back in Vanilla and didn't really hang him up until around the end of Pandaria - though I did take some large breaks from the game, like a good few months to a year just before... whatever expansion had Icecrown Citadel - the one with the Death Knights.
For longest RPed character, it might actually be Chachanji! I mean, I've been playing this game and RPing as him for... what, three years now? Not quite as long as those who have honed and adapted a single character across many a system... but not too shabby!
So, the length of the character's "survival" tends to just depend on how long I have been playing that particular game or system. So, by that logic - even though I never really RPed with him - the longest-lived character is probably my Night Elf Hunter in WoW. I created him back in Vanilla and didn't really hang him up until around the end of Pandaria - though I did take some large breaks from the game, like a good few months to a year just before... whatever expansion had Icecrown Citadel - the one with the Death Knights.
For longest RPed character, it might actually be Chachanji! I mean, I've been playing this game and RPing as him for... what, three years now? Not quite as long as those who have honed and adapted a single character across many a system... but not too shabby!