call of duty bo2/bo3

I definitely played BO2 a lot more. Both on PC and PS3 (first and only game I've preordered).
BUT I play a fair bit of BO3 now with my friends, as it is the only zombies game that has the steam workshop. People are still making new content on the workshop, custom maps, mods, everything. It can be quite enjoyable but it's a black hole for time.