I felt the same way. My first playthrough was with a Cullen romance and it was all nice and happy. But after a playthrough with Solas I feel so much more affected and invested in the story and even though it was so heartbreaking I only want to romance Solas henceforth.
I'm the same. I was 50/50 on Solas vs Cullen on my first play through... went with Cullen and it was nice, I liked it. But then saw the stinger, mentally kicked myself, then immediately started over for Solas and I haven't looked back. Honestly his romance scenes are so much better anyway--but maybe that's because I'm very much an introverted intellectual so he gives me all the tinglies. Solas4life.
Also I'm catching up on the thread so I have a few things:
Re: Solas being straight
I honestly think it fits. I like that this time we have strictly straight or gay characters, and just a lot more of them. It makes it feel a bit more real, whereas DA2 was just like "pick the one you like it don't matter". I think it gives him more characterization to make him straight. Like others have pointed out, I was getting a little sick of all elves being bi in this game so far. Plus, he's a wolf god, and even though the "wolves mate for life" bit isn't exactly true... well, I just think him being straight makes sense, even though I admit I may be bias.
I understand the complaint for males due to the story stuff, but I really think that's very minor, because 1) if you want to experience the story you could always roll female and 2) so far with DAI Bioware has not impressed me with making choices matter. The writing is excellent, don't get me wrong, but I was just incredibly miffed that, even though I romance Solas [a god], there's no way to recover the orb, he still leaves, he doesn't come back to explain... nothing.
Maybe this will change in DLC. I really hope that romancing him does open some options there. But learning about the Vallaslin? Eh... I think there will be other ways for a male to learn.
Re: Solas break up
Okay so I fully admit that I'm probably just in denial, but I wanted to hear other people's takes on this. It was funny because, after the vallaslin scene, I didn't really think it was "over". I mean, he does kind of say as much, but I was just like... no way. (BTW I did the "Solas..." and the "I love you" options, as well as the "I believe in us" option which both amount to almost the same thing, though the "I love you" is absolutely heart breaking).
Ahem, anyway, I of course immediately run to Solas and ask if we can talk and he does the "Things will be clear" line.
So I'm thinking, we're not over. It's not over, he's just pulling away, right?
And then the end, and he's gone, and I'm like... *stares*
Is it weird that I just don't feel "broken up"? That he didn't really end it? Everyone else seems so sure, but I just don't think so (assuming you didn't end it in the scene, that is). My brain interpreted it as... he's got his secrets, he can't share, doesn't want to hurt you, but still loves you, so it's not over.
Maybe it's just wishful thinking? Also, I would point out I've never actually had experience being rejected--I married my high school sweetheart, so yea. Never been dumped before. Is this how it feels? The I love you scene I felt like my heart was just punched out of my chest 