Why is your icon Jigglypuff but you play Falco more than you play Puff
As we all know, Jigglypuff has not gotten very good treatment from the SSB developers for a while now. Well I enjoy her playstyle, playing with her against other, better equipped characters gets tiresome knowing that I'm playing a cripple.
For tr4sh, I've dabbled in quite a few characters, including Jigglypuff; however, I don't regard the game highly (obviously), so I listed the bare minimum characters I'd expect to play if given the chance. I haven't played real matches in Brawl in a very long time, but when I did, Falco and Jigglypuff were about my most favorite---but Falco clicked with me more.
In Project M, she's a much better character, even if she's just a Melee port. I still prefer playing with Falco, yet Jigglypuff remains my second favorite character to play.
While her Brawl Minus incarnation is undoubtedly her best yet, I don't play her in it because she feels a bit too different from what I'm used to (how I feel about Zelda in this mod versus the other Brawl incarnations as well); aside that, Dedede, who I also liked in Brawl, fulfills a similar function Jigglypuff does, but he's at least twice as fun for me compared to every other character (because players can manually control up to four Waddles on screen at once), so I play him instead. There are other characters to play who I wouldn't be able to play the same way in other games, like Waluigi and even Roy, so I play them more too; so many of them, not interested enough to play her.
To answer your question, I chose Jigglypuff rather than Falco because I liked her just about as much as Falco, but I suspected Falco avatars would be more popular, and maybe less appealing to others. A Jigglypuff avatar, I assumed, would be more distinctive and less common.