I'm never going to be interested in a dwarf LI, so I'd rather Varric wasn't an LI. If he's the hetero option, though, it doesn't make much difference, to me, I guess.
I'm sort of hoping for Cullen as bi, Dorian as gay, and Solas as straight, because it seems like the best balance of what I want vs what seems to screw over straight women the least. It seems like Solas has the biggest female following next to Cullen and that's one companion LI for everyone. I don't really see many male fans for Solas and Dorian is easily the gay favorite, as far as I've seen. It seems like the closest I can see to an ideal situation without a last minute decision not to have set sexualities, which is probably impossible now.
The situation with female LIs seems less easy to divide, because the interest between Cassandra and Sera seems more evenly distributed and Scribe Girl doesn't have anywhere near the following Cullen has. There are also a lot more people expecting Vivienne than are expecting any of the niche male LIs to make it. That situation is going to go down horribly, no matter, it seems.