Anime Dub done right.

The only English dub I prefer over the Japanese dub is Cowboy Bebop.

Full Metal Alchemist still has one of the best english dubs.

hentai??? Ewwwwww

Im gonna randomly post some dubs that I think are good now :

Code Geass - Overall solid dub . The best part is Johnny Yong Bosch's Lelouch.

Steins;Gate - While at times a bit toned down compared to his japanese counterpart (Miyano, Mamoru), Michael Tatum did everything he could to give us an awesome english Okabe, that I personally didn't expect to be any good. I was obviously wrong.

Fullmetal Alchemist Brotherhood - Big and diverse cast, but practically everyone is delievered well. I like it

Baccano - Tons of awesome sounding accents . I've heard some of them were a bit incorrect for the prohibition era, but they still help to bring the point acros and establish a cool setting. Would recommend over the japanese dub in this case.

Watching Baccano! in English does make sense, since the show is mostly set in New York City.

Also : Panty and Stocking hit the nail on the fucking head :

Fairy Tail has a great english dub too, though script dialogue is different from the japanese version.