Thanks for the responses! I think I will definitely hold off on the Nalia romance until jcompton's version comes out. I was rather annoyed about a certain main romance's plot (or lack thereof) in ToB (I don't want to spoil, as this is SoA board). So if not much is happening in the Nalia romance, then I might as well wait and see what jcompton gives us...
I might do the Imoen romance just to get it out of my system (hey, what can I say, I was crushed when I found out she was my sister!). If I don't like it, I can uninstall and dream of a better, more ignorant time a little closer to Candlekeep.
Tashia might be fun to do after the other two, especially playing something like a barbarian with 6 wisdom.
I am definitely going to try the flirt packs first, though. It kind of annoys me that I have to wait for them to talk to me for anything to happen (read: Jaheira's romance is painful sometimes).