I'm a bit mental when it comes to this. Colours aren't important, but for some reason I feel compelled to use all the same brand when I buy kit. Actually, I do prefer traditional and understated colours (greys, blacks, whites) on my kit, rather than the larish oranges and pinks and blues and neon greens. At the moment I'm in all Gray-Nicholls, and before that I used all Puma.
Currently I've got a XXX GN bat, XXX 750 gloves and XXX Custom pads. It helps that the pads are the best pair I've ever had and the gloves are extremely comfy and the leather on the palms is so soft. On the gloves, I did go for those over another pair because they had a white wristband rather than the traditional GN checks (so I guess colour did matter after all!). I also bought a Masuri helmet in my club colour (navy) because the only Albion, which I was going to buy (ideally I'd have bought an Ayrtek, but cost!) in the store was white.