I won't do all of the romances. I just have a hard time getting through playthroughs if I can't connect with the PC and in games where I can be a gay man, I struggle playing anything else. I'll do a single female playthrough (with a dwarf, natch), but beyond that, it will pretty much just be alternating between Dorian (primarily) and Bull (occasionally) for me.
So, given that my preferred PC is a male, gay, and a dwarf or qunari, I can pretty much rule out Cullen and Solas 100%. I, literally, don't click a single one of their requirement boxes. I can also pretty much guarantee ruling out Cass since I don't think I've ever rolled a straight male in a Bioware game (even my Shep was gay in ME and ME2, he just didn't have a romance to 'be gay' with).
So it all rests on Agathe's solid dwarfy shoulders to determine which of the remaining three romances I get to see: Josephine, Sera, or Blackwall. I'm leaning towards Blackwall at this point, but Sera might just win her over. All in all, I'll likely only "do" the romances for Dorian (done and amazing), Bull (happening soon), and either Sera or Blackwall (tbd). The rest will be youtube views and living vicariously through you all.