I've been doing taekwondo and muay thai for ~3 years, but don't take classes anymore because money to pay for the classes became a problem really fast. Of only one of the three years I've been training have I actually taken a class, but I'm kind of glad I stopped taking classes because I taught myself more in one week than the programs could in three. I have friends who take classes for muay thai and taekwondo and we spar and teach each other things regularly(not so much anymore since my back is all screwed up again)
I started studying krav maga 9 months ago for (obviously) self defense, and because I plan on joining the marines. Since I don't really study/practice any grappling-exclusive martial arts, I use throws I learn from this in sparring
I've also studied a little bit of ninjutsu(for more bone-breaking techniques, open-hand strikes, and throws/takedowns) and capoeira(great for choreographed fights lol)
Here's one of my friends at a muay thai fight(red shorts). He should have won, imo it was a terrible decision :p Excuse the terrible music, the guy who uploaded and recorded it recently became addicted to dubstep lol