I'm currently keeping up with ichiban daimaou, maid sama, hakukuoi shinsengungumi, fma brotherhood, angel beats, rainbow, durarara, k-on, working, heroman, giant killing, yojouhan shinwa, senko no night raid, b gata h kei, house of five leaves, arakawa under the bridge, one piece, fairy tail, hitman reborn, and dragonball kai. That's 20, 21 if you count katanagatari.
Don't get me wrong though, I don't watch every episode on the day it airs. I'm actually pretty behind right now. Best on that list is rainbow, night raid or shinsengumi. Worst is hitman reborn. I just keep watching because I'm caught up on the latest episode. Same goes for one piece.