For me it is his long lasting monk series . . . I love that series and the main reason i watch it is b/c of his great acting and performance playing as the defective obsessive Monk. The way he carries that character is amazing.

Monk for sure. Way different from the character he played in Wings. I liked how he played his character in Polly too but it's all about the Monk.

Yeah i think Monk is where his large fanbase came from, I know it grew my attention ;)