It should go:
Rodents: Rattata, Sentret, Zigzagoon, Bidoof, Patrat - Zig for me because Linoone is beautiful!
Birds: Pidgey, Hoothoot, Tailow, Starly, Pidove - Pidove for me = Unfezant is epic!
Electric: Pikachu (+evos), Pusle/Minun, Pachirisu, Emolga - Pikachu, but I like the last two too...