Yeah I did enjoy fighting them. The only enemy I did not enjoy fighting in NG2 was that awful worm mid-boss in the tunnel in the jungle (which was obviously not finished by any stretch of the imagination - complete with horribly textured cave walls).
Stupid fish boss with face in the subway tunnel was even worse. And the stupid water dragon boss after was terrible as well. Come to think of it most bosses in NG2 were just terribly designed with unblock able or avoidable attacks.
But dismemberment was just so satisfying. Especially on those rocket ninjas after you slice them up and they crawl and you do even more crazy dismemberment.