Mine would have to be my helmet... Easton E700. It has totally changed things for me....
It fits me perfectly. It is lightweight. It absorbs sweat very well. The pads are removable/replaceable.
Before I got the E700, I used a Cascade M11. It pinched in several places and I always head a headache after playing. Not to mention that the sweat just poured off of it.
Before the M11, I was in random foam helmets like the CCM V08, NB 4500, etc. I suffed a concussion with one of those though which prompted me to switch to something that at least provides more protection.
As picky as I am, I can't see myself changing out of this helmet. I better stock up!