I've always played straight female characters, and I feel like this time around I might actually be interested in all the male potentials. To where I could see myself actually jumping out of my comfort zone should one end up m/m exclusive...
Anyway, first choice is Cullen. For a fairly minor character, he's had a nice story arc and a lot of character development so far, so I'm excited to get to know him in Inquisition. Would be fun to romance him with a reformist mage, if possible.
Second is Solas. Granted, we know almost nothing about him, but the little we know intrigues me. And i realize I'm in the minority here, but I think he's hot.
Close second is Dorian. Normally I hate guys with mustaches, but i dunno - on him it works. Mostly though it's because he's a Tevinter mage, albeit a not evil one, which is kind of awesome.
Ultimately it depends on their personalities however. Everything I'd heard about Fenris made me think I'd totally go for him, but in reality i was like, 'meh...'