I liked Frieza better. Partly because the whole Namek arc was this cool cat and mouse race to find the dragon balls while ducking him. Trying to trust former baddie Vegeta. Then it being Piccolo's home coming. Finally the face off with the strongest being in the universe. The ending of Goku achieving the legendary super saiyan to Vegeta's shock, bittersweet for him because it wasn't him doing it but he got to see Frieza eat shit. Then finally a cliff hanger if Goku survives Namek explodin' or not.
The series felt very [insert universe strongest baddie here] after Frieza. Okay maybe a pass for the androids because it was cool to see Future Trunks but I didn't like Cell and I really stopped paying attention during Buu.