I still regularly follow music, fan-art and to a lesser extent any pony related material people likes on Youtube.
But I don't sit around thinking of ponies 24/7 and I certainly wouldn't think about talking about them outside the internet so I don't consider myself a brony for those reasons, and pretty sure the media has made "brony" a dirty word anyway so I wouldn't want to be.
I wish I had gotten into the music part of the fandom much sooner than I actually did. Now there's so much of it and impossible to keep track on everything (not that I was possible to do so earlier but it's not getting easier haha).
As for other activity in the Fandom, I've sort of stopped going to Equestria Daily. I think I need something else just for variation and not suck the hobby completly dry.
But what? hmm...
John de Lancie and some other people producing a professional documentary about Bronycon and the MLP phenomenon in general. They need at least $60k in donations (though it appears that the minimum amount will be well exceeded).
I would definitely recommend donating whatever you can to support this project. There are even some rather compelling prizes you can get for donating a certain amount.
I was about to ask who in their right mind would actually pledge 10k just to get those prizes, but then I realized that people have spent thousands on plushies/fursuits. That value suddenly seems a lot more feasible.
I'll definitely be donating some cash myself though. I'd love to see it take off.
I seriously can't favor any song from the show over another. They are all truly magnificent in their own way, more or less (Well, some ARE better than others though.)
I mean...do I even need to get started? Nah.
Every now and then I come back to listen to Season 1 songs, only to jump back to "present" and the season 2 ones. Heck, I can't decide, I like them all.
I might try on making a remix of one of the songs myself eventually. Been thinking about Art of the Dress, but would it be considered "too late" for that by now?