Felt a bit odd when I first realized that all companions in Dragon Age II were either bisexual or "straight + Hawke", but after I'd progressed a bit further I came to appreciate it. It's easily worlds better than the limited options in Mass Effect 2.
My Lady Hawke started by sexing it up with Isabela, and then moved on to Merrill when Isabela explained that she just wanted casual sex. My next character is going to stay with Isabela and see how things develop, though.
So, yeah, while a straight male I'm now considering aiming for a male-male relationship with Fenris in the future. It'd be cute. Not with Anders, though, since his role in Awakening stops me from accepting him as anything other than heterosexual, but that's my choice and nothing anyone else has to care about.