One thing about fans though, don't just go a bunch of fans and slap them all over the place. Most towers are designed with specific airflow paths designed, so if you put and extra fan pulling or pushing air in the wrong direction. it'll completely ruin your cooling.
*Edit for tower sizes. Personally, i think it comes to personal preference, and space. I have a Full tower, and I wouldn't do it any other way because i'm constantly working in it, add/remove parts so on and so forth. But it does take up a LOT of room.
Edited by Highjinks, 21 June 2016 - 04:13 PM.