there's already a few threads like this, i'll link you to some so you can get some more information.
Anyways, as much as people say it, FoD is not a good falco stage. the end.
all the other stages are pretty good, FD is great for lasering and comboing but its bad against chaingrabbers (good fights on this stage: samus, ganon, sometimes fox, etc) (bad against: sometimes fox, sometimes marth, sometimes peach, basically chaingrabbers becuase there's no platform to save you) You can still fight the CGers on this stage of course, but you have to keep good spacing with lasers or good pressure. once you get grabbed, some stupid **** happens.
I like Yoshi's Story now. i used to hate it, but i personally like it. its not the best stage but its good. the close kill zones are pretty good against people that generally recover good, but its also an easy stage to die on for yourself unless you DI well, but even on other stages its hard to recover becuase of falco's limited recovery.
Pokemon stadium is probably the next best besides FD. its pretty flat and good for your lasering, but some of the changes are pretty ******** but usually people will stall with projectiles until the stage changes back lol
DL64 is pretty good, but i don't like it against floaties and people with amazing recovery like Peach, Marth, sometimes luigi, and sometimes CF and Ganon becuase of their down b bonus jump, but they're easier to edgegaurd compared to others.
battlefield is pretty ******** to me but its certainly not a bad stage. just stay on the stage, once you're off you're pretty screwed. you can't wall hug and its hard to sweetspot against good edgegaurders (like countering marths, gross)
that's my analysis about what stages i like and don't like. any constructive criticism on my views is welcome and would be appreciated.
good luck and i'll hook you up with some other threads like this later on.