Nunu can be played as support. His skills gime a high amount of utility.
Iceblast/Ult. are great for slowing and blocking apponents. Bloodboil is one of the best buffs for AD-based champions. With consume you can stay a long time in the lane. Nunu dosn't have any heal, but he can be played as support.

SI ^

As others have said above, you should add tons of pictures to make it easier to read. And, remove Nunu and add Karma. Nunu is NOT a support character.

Until now, I've (mostly) played with carries. But after reading your guide of excellence I feel like buying... Alistar.

seems to have potential, add some pictures, more info and you should be good to go
i'll vote once you finish

nice still far from finihed though u should have karma up there

nice guide,still unfinished