I also like his Easy Wind solos, a lot of it is Bobby.
Ace's solo on the studio version of "Heaven Help The Fool" is great.
I generally like Weirs slide playing until he get's into nosebleed territory where he always seems to go sour...make that screechy and sour. (*)
His "rhythm slide" is great and I think a very unique approach.
*Edit - The same seems to happen to his voice when he goes up real high with his falsetto "screams" and general "testification" (late period).
Stay low Bob, stay low!