If I'm playing against a Marth, I'm doing the neutral with falcon. I just don't like the matchup too much. I've been ***** by no-name (then again, I am a no-name) marths on mute, and peach just doesn't get the upper leg she normally does on that stage. Granted it is ****ty for everyone else, I, personally, don't like it all that much.
Marth is one of the matchups where I dash attack. It's a good way to get inside him and to change it up from my standard turnip-fair. I think whoever's applying more pressure is winning that matchup.
And MacD would say that, mr. fc aerial -> dash attack combo -> rinse and repeat combo. You did break that habit, though.
In other news, Ftilt and utilt are very, very underrated combo moves. I really wished people saw that video I posted a couple pages back, it used it very well. Ftilt starts chaingrabs and the weak hit is good for. . . stuff. Try it out.