I haven't been playing multiplayer, I've loved the quests, but for that, here are my tops:
Top Plants
1.Citron. His shield is fun to play around with. I'm not really enjoying him, but you asked for top played, not favs.
2.Acorn. His Oak mode is helpful to beat bosses and just really fun to play around with. Definitely my fav of the 3.
3.Peashooter. Kind of accidental, he is just the average boring plant, but he's really good so...
Top Z-bies
1.Engie. He Da Best!
2.80's Action. His charge up is helpful for those weeds and dandelions.
3.Super Brainz. His charge up, shield, and abilities are really great for countering Nightcap in Giddy
Not so hot
1.Scientist. I was a big Scientist main in GW2, but I just ran out of touch with him.
2 Deadbeard. I liked Cactus, but Deadbeard I just didn't want to play
3.Snappy. He's really cool, but not really useful. I'll probably play him today though.
Favs
I just decided to do my favorite out of the characters for plants and zombies.
1. Engie! HE DA BEST!
2. Chomper. As bad as everyone says he is, I've gotten use to him over the past GW games. Everybody else is kinda a newb. You just gotta play him right.
3. Nightcap is fun to play. I just haven't been playing her
