I pretty much always try to go to Battlefield game one.
Fox: Really depends on the Fox. Use game one to figure it out. If they like going in a lot, ban yoshi's. If they're on the campy I ban either FD or Stadium. I usually ban FD but they're both **** for you so pick your poison.
Falco: I ban Yoshi's pretty much always.
Marth: I ban yoshi's or FD. I tend to lean on banning yoshi's though.
Sheik: I get rid of Yoshis or FOD, but I just hate FOD. That being said the side blast zones on FOD are **** so that's why I'm lumping it in with Yoshi's. Most sheiks won't take you there anyway.
puff: dreamland.
Falcon: Stadium or Yoshi's, both are kinda poop but it's up to you.
ICs: FD. No platforms make everything a pain in the ass for you.
Peach: I ban Dreamland. Yeah I live forever too but man I got **** to do, I'm not trying to run a match to 00:28.
Pika: either stadium or yoshi's.
Samus: I ban FOD, I suppose DL could make things annoying too though, so follow your dreams.