Brother, don't underestimate supports. Honestly, my best friend (a guy) is a support main and he always knows it's worth playing it. They can be initiators too :D
Anyway...
Right now in League, I'm a solo-top main due to the champs I tend to main (Tryndamere, Yasuo, Riven, etc)
And even as solo-top, I still buy wards. Wards should be bought by everyone in League (and Dota 2 if possible, they got no trinkets.)
My secondary role is jungling, which is fun because it's like real-time chess. No waiting for turns, you have to think what the other jungler is at and if you can do steals.
And the best parts of jungling?
Drive-by Smite-ing (what I call for stealing objectives like Dragon/Baron and mobs like the Blue and Red.)
Disrespect Smite (my nickname for the blue Smite, because I tend to use it for lasthitting if it was too easy of a chase/kill)
My worst role, however, is AD Carry, or ADR in the Philippines.
Because: I can be imbalanced with it. It's either I'm fed or I'm rekt. Nothing in between.
But if I play ADC, my favorite champ to play it with is Graves, and sometimes Kalista.