I prefer Lou Reed's work with the VU over his solo output. Transformer sounds dated to me. In fact, some of the songs on Transformer were done better on those mid 80's Velvets outtake albums. I'll take Rock n' Roll Animal and Take No Prisoners over Transformer. The rest of his catalog doesn't do anything for me.
As I see it, the problem with Big Black is twofold. First, everything from the music to the lyrics sounds contrived. Secondly, if it's abrasiveness and unpleasant aesthetics they're going for, they fail miserably on both counts. I've heard old free jazz records from the 1960's that are far more abrasive and unpleasant sounding than anything Big Black ever recorded. Some people say they like Big Black because they offer a unique insight into the ethos of Middle America. For me, it seems like Steve Albini is just trying to piss people off. I'm just not impressed by them. They're boring.