The real challenge here is remembering everything that Samuel L. Jackson's been in. Good luck here, folks.PS: Can we do a best and worst of Samuel L Jackson someday?
For best, I'd of course have to go with Jules Winfield in Pulp Fiction; the role is absolutely iconic. It sounds like the easy pick, and maybe it is, but I definitely feel it's the right one. I can't imagine anyone else playing that role, not even Laurence Fishburne.
For worst, I'd have to go with whatever role he played in S.W.A.T., that of the head of the unit who ends up going corrupt or something. The whole movie was dreadful, but I certainly remember his performance for not just being dreadful, but him obviously not giving a fuck how dreadful it was.