I too voted for Silvio. Throughout the Sopranos he's stayed loyal to Tony and the soprano crew, he's a good earner, a good consiglieri, he's a damn sharp dresser and generally a like-able character. I still burts into histerics(excuse he spelling) at his Don Corleone impersonation from GF3.

In all fairness i love so many individual characters in the Sopranos, it was pretty hard to narrow it doen to one ultimate favorite.