The scrolling is the biggest bit of bullshit about the UI. Typical Apple bullshit - like the way they decided their keyboards should have a few symbols in different places just for the **** of it, and the hash key shouldn't even be printed on the keyboard presumably because it's not a pretty enough symbol to be on an Apple keyboard.
There are a few things that make me want to keep Lion though. Mission Control shits all over Expose, Mail works better, Finder works better, Resume is handy. Whereas the things that irritate me are the pointlessly stupid scrolling reversal, the iOS-style scroll bouncing at the end of documents (don't waste my time with bouncing the ****ing content I'm trying to do some ****ing work), the swipe history transitions in Safari - all the pointless eye candy that just slows you down.
They also turned on autocorrect by default. Why? If I didn't have it on in Snow Leopard I'm not going to want it on in Lion either, leave it the **** alone.
Oh and my network drive no longer works as a Time Machine backup, unless I hack it again.