How can you say you'll never be a fan after 3 films? First of all
MASH is disliked by a lot of people, so no surprises there. The other two,
3 Women is not very Altman like really, but is very good.
The Long Goodbye, I'm not sure why you don't like it, but okay. And doesn't pay enough attention to detail? His movies are filled with too much detail if anything. Camera is always moving, people are always talking, it's realistic. I'd consider his cinematography some of the best ever, it's intelligent and real, we rove around everywhere, listening into people like we're there, his use of overlapping dialogue is superb. His camerawork doesn't seem forced or cinematic, but real, PTA draws attention to himself with a lot of his work (although I love it), with Altman it's natural, and it's not like he's trying to impress anyone.
Nashville and
Short Cuts pretty much inspired
Magnolia and
Boogie Nights. I appreciate them all, Altman is possibly PTA's favourite director, and the influence is clear. I know you haven't watched those films but i's annoying when people praise PTA for such stuff when it wouldn't exist without Altman.
You haven't seen:
Nashville, Short Cuts, McCabe & Mrs. Miller, Gosford Park, The Player and much more. I don't know why you seem so determined in your opinion and have to remind us of it every time as if you're proud of not liking Altman. It makes me sad