Have you listened to their stuff before Badmotorfinger? It's bad. Really bad. With the exception of "Big Dumb Sex," which is okay.
I just listened to clips from Ultramega OK and Louder Than Love, and a lot of it sounded all right. They even had a Grammy nomination for Ultramega OK. The first song on that one, "Flower", sounds pretty good, but I didn't care for much of the rest. Louder Than Love seems more consistent. Of the four big Seattle bands from that era (Nirvana, Pearl Jam, Alice in Chains, and Soundgarden), Soundgarden was the one I was least into, and I still don't own anything from them except for what was on the Singles soundtrack. I might be inclined to get their greatest hits or some selected tracks someday.