Woody can be very hit and miss, both from film to film and person to person, but when he is good (Manhattan, Hannah & Her Sisters, Crimes & Misdemeanors, Broadway Danny Rose, Sweet and Lowdown) he is VERY good. Unfortunately, he has as many mediocre films as he does good ones. I have Match Point waiting for me at home from Netflix right this very minute, so I'll let you know my thoughts on that one soon.
Full disclosure: Manhattan is in my top 5 all-time favorite films.