I don't play online, so I will divulge my favorite plays.
If I've got good linebackers and safetys, I like running Dogs Zone Blitz a lot from a dime package. It does a decent job of shutting down most running lanes/pressuring the QB and maintaing decent zone coverage. Other than that, I just like to run 4-3 and Nickel and call the play depending on the situation.
On offense, I'm all about rushing. Lots of counter plays against crappy d-lines. I'm not a big fan of tosses, so I barely ever run those. For the most part, my offense style is a combination of running up the gut and west-coast style passing. I usually run on first, pass on second, run on third, then run on fourth and less than three, or pass on fourth and three or more if I really need to finish the drive.