At #25, I think all of Zeffirelli's Shakespeare films are painfully bad and dull. Taming of the Shrew, Hamlet (with Mel Gibson!!) and the interminable camp, trite, faux-Italian but still very repressed-English Romeo and Juliet. For my money, burn them all- I reckon they've put more kids off Shakespeare than anything else!
I don't think either adaptation of "Lolita" works particularly well as a version of the book. But Kubrick's is brilliant as a film in its own right - the Jeremy Irons version isn't.
I think that the Al Pacino version of "The Merchant of Venice" takes the award for me though. Passionless, self-indulgent, slooooo-oooooow speaking, and a film that makes the idea of spending three hours painting a wall and watching it dry seem attractive. Spare us.