Titan main (both subclasses look awesome) and Hunter alt (Bladedancer FTW). Warlock if I get sick of the other two. :-D
I'm loving the idea of the Sunsinger. I absolutely love playing support/utility roles in these kinds of games. I was the best siren I knew in BL2, and that's not just me tooting my own horn. If the others in the party had at least a tiny amount of skill I could keep them alive throughout anything while still contributing a considerable amount of damage to any enemies. People that stood in the fire, well, they weren't worth the effort. CC's, healing, area control, I love all of those things at the cost of lower damage output. The better I can control the field of play the less damage the enemies can do and I don't need to throw as much bust damage as others.
Plus, the Sunsinger seems like it may end up being one of the less popular subclasses. Everyone loves to be the hero.