Pretty much just the original unaltered trilogy for me.
I really enjoyed the X-Wing and Tie Fighter games on the PC, but they started adding way too many different types of ships. Made it interesting from a game standpoint, and I thought having all those new ships was a good inclusion, but it pushed the envelope too much for me as far as being canon.
I read the 3 Zahn Thrawn books, but I didn't care for some of the first one. It got old having Thrawn always knowing exactly what was going on, never wrong, blah blah blah. Didn't make him threatening to me so much as just uninteresting. So I liked it when he wasn't so infallible later on, he was a more believable character then. Still, I've never really had the desire to reread those. I'll reread the Robotech series if I get in the mood for sci-fi books again.
I love the Genndy Clone Wars cartoons, but as they're tied into the PT framework that rules them out as canon for me.