I would have to go with Electric-type Pokemon, as they are my personal favorite. As for an actual team? Well...
Magnezone
Rotom (any Forme)
Eelektross
Zekrom
Manectric
Lanturn
Basically, a few of my favorites, a couple dual-type ones, and Rotom, who can have six different secondary types. I'd probably go with this team, although a couple of these can be swapped out for others if need be.