Charecter: Freiza. His fingerlaser is incredibly potent. High health and a good starting PL are nice, deathball is nearly unrivaled in terms of PL/explosion, and his low perfect trans level makes for an easy way to build up PL quickly.
Map: ESF_City. Diverse terrain, and multitudes of things to do and ways to fight.
Attack: Generic beam. High damage vs ki cost, and an excellent way to manipulate an opponent into a more favorable position.