I've only seen FMJ, Spartacus, The Shining, and 2001.
As a scifi guy, 2001 is really cool and I like it, it's a classic. But it is kind of a hard watch for most people due to the slowness and confusion that is inherent. My gf is not a scifi person and she would absolutely walk out on that film.
FMJ was OK, I didn't care for it. There were lots of 'Nam movies around that time and this was one of them, to me. It was very angry and everyone was terrible. Pass.
Spartacus I saw as a kid, don't really remember it as anything other than your typical Rome move from that era.
The Shining might be the worst movie I have ever watched end to end. Stupid, boring, not scary. I do not understand why people like it. Build up Scatman Carruthers for 90 minutes, then toss that entire plot away with the swing of an axe - and it isn't even scary! My son & I were watching and busted out laughing at that scene, the first time either of us watched it.
The only positive is the Simpsons did it on Treehouse of Horror, and its one of their best.
Overall my opinion on SK is that his movies are probably excellent from a artistic point of view, but that doesn't make them "good" or "enjoyable".
It reminds me of an Onion one-liner: "Experimental Band Theoretically Good"