Al's Pizzeria 

This venerable establishment, which has been facing Bachman Lake since it was a puddle, feels like a slice of Manhattan in the middle of Northwest Dallas. The pies are enormous and juicy (dare not say greasy), served so hot and sloppy you need 10 napkins for just a slice--and a fork, too, unless you've brought a change of clothes. The pizza's available by the slice, but like the commercial says, you can't have just one.
Best Of 2003: Best Pizza