Hm... Well off the bat I'd switch with Jin from samurai Champloo. I like the idea of being a wandering ronin who kicks the shit outta bad guys. For the others I'd have to think
I'd switch with Keiichi from Higurashi, hitting on Rena whenever I have the chance. (This is, of course, after they've beaten the endless loop and live a normal life!)
I'm actually very surprised no one brought this one up. Onizuka Eikichi. Let's face it, he's just that GAR *cough* garfest plug *cough*. True he's still a virgin in the series, but he has plenty of opportunities (looking at you, Urumi) to rectify that situation.
id switch with light from death note cause i wouldnt make the ending stupid
but id love to trade with Nozomu Itoshiki from Zetsubou-Sensei cause that would just rock out loud being able to say I’m in despair!!! (something in here) has left me in despair!!!
Oh and all the semi-psyco girls in the class room bonus bonus
I'd switch with negi, change his name (i mean how the fuck did a british guy get a japanese leek name?) though i wouldnt know who id end up with... maybe konoka, i mean Asuna is your aunt and over 35 years old..... or i can always go with nagi springfield cuz he is superman even without magic and no harem problems.
the 1 person i would not want to switch with is Guts, sure he is pretty gool and gar, but his life is SHIT, who would want to live the life he live... his wife is insane and hates him, he cant sleep cuz he is assaulted by demons every knight, and his best friend became a god and raped his waifu...