Um... I vote ALL of the above!!! 8-D

Granted I'm sure for many there's a bit of a ranking but the hottest part of a football players uniform is all of it!
For me it would likely start with the Football Pads, the more and the bigger the better, at or near the top of my list most of the time, tough call between jockstrap or jersey as second and third depending on my mood, followed by slipping into the pants and getting everything well situated, whether gloves or helmet come next is a tough call followed by the other, then finally socks and cleats to complete the uniform.