Ahh yes, the oldies are my favorites~ Recess was definitely my favorite. I would watch it all the time before it stopped airing.
As for some others, in no particular order, that would be Hey Arnold, Johnny Bravo, Dexter's Laboratory, The Powerpuff Girls (original), Foster's Home for Imaginary Friends, Samurai Jack, both old and new (where they continued and finished it), Codename: Kids Next Door, Teen Titans (original), Static Shock, Ben 10 (the first series), the old Loonie Toons classics, the first season of Pokiemon through to Diamond and Pearl, Freakazoid!, Chowder was okay, Transformers (I forget which one but an old version) ¡Mucha Lucha!, I enjoyed Robot Boy, 6Teen, Duck Dodgers was fun, Totally Spies! is a nostalgic one, Code Lyoko, Dragons: Riders of Berk, and others to name that I can't remember X3