FD is good for the above stated reasons, huge space for falco to control with lasers and it lets him use all of his mobility. The only disadvantage is that its also a great stage for chain grabbers and for this reason I prefer dreamland and pokemon stadium in its neutral form since they are both very big stages and they have platforms alowing falco to combo/help him escape from chaingrabs. Yoshis story and Battlefield are good too if you know how to use platforms for comboing with falco, though marth does a bit better on Yoshis story imo just because he can control so well from underneath the platforms. I don't like fountain of dreams probably because I'm a noob and I don't like the moving platforms or the flashy colors. Its basically like Battlefield or yoshis story just with more extraneous crap that I don't like.
I don't mind (out of the non neutral stages) poke floats or rainbow cruise since falco can move around fairly well and has space to laser though they aren't my favorites but I probably prefer playing on them to fountain of dreams to be honest.