What's wrong with wanting all characters to be romanceable? I think that a romantic arc is a good way to cover a lot of ground that a friendship arc does not, and certainly allows us to explore a great deal of pretty human themes. It also allows for the game to introduce gated content based on your ingame decisions, rather than something like gender - because the moral diversity of the companions allows for there to be options, but options that accord with who the PC chooses to be, rather than gender.
Mainly because I don't want them to stretch themselves that thin. We need to be aware that word budgets are a very real thing. Personally, I'd prefer 4, maybe 6 characters that were available to all versus trying to make every companions and major NPC in the game up for romance. 4 LIs, available to all is my preferred method. I'm not against the idea of "set sexualities," just to let everyone know. I'm just nervous about how they are going to handle it.
In general: That's something I want to nip in the bud right now. It isn't because we might not get our preferred LI and I would appreciate the devs stop claiming that is the only reason for this. For some, that is the only reason. However, after reading the forums for months, that isn't the majority of the concern. For many of us (not everyone, blanket statements are bad,) it's because of things like making the only gay male LI an NPC ala ME. Or how you can skip and/or kill off the only two bi romances in Origins. Personally, that was where my apprehension is coming from, not "Oh, I might not get Cassandra as a LI." 
More like drop dead gorgeous, but I suppose "lovely" works too lol
Sorry, there is only one companion for me (Varric) and since he's most likely not going to be a LI, I just stare longing at his fan art. At least I get my favorite friendzone dwarf back. 