Lakatos was a great philosopher of science, while Feyerabend is a gadfly. His "Proofs and Refutations" doesn't really hold up -- once mathematics reached the modern standard of rigor the process he described stopped -- but his notion of progressive versus degenerating research programs is very powerful.

I knew Feyerabend in Berkeley in the early 1960's. He was an engaging character, a large personality, a brilliant conversationalist, always surrounded by an interesting collection of other articulate people as he held forth at the Mediterranean Coffee House on Telegraph Avenue. Right or wrong, his perceptive observations motivated further consideration.

And he was really a caring, friendly guy.

Science makes a really crappy religion.