Generally I think of you as someone with rather cheerier tastes than I (all my favourite media are my favourites because they shred me), but then again you are a big fan of S&A, which is devastating despite its humour. It depends what you go to the classic scifi for, I suspect - if you need some happiness, then B7 is not for you (there is comedy, both intentional and unintentional, but the basic set-up is unrelentingly grim). OTOH, it is really quite wonderful, if you can bear the misery! It sounds from this review as though the "warmth and sweetness" you get from some scifi is not actually a prequisite, so I'd probably give a qualified recommendation that you try it out. B7 very much benefits from being watched in order, and in large quantities.

(I know what you mean; the overlapping bits of our interests are diverse, but not easily explicable.)