I do game quite a bit, but between work, a girlfriend and the often desire to get drunk with the crew; I probably don't game as much as you'd think from the shine.
I would say I game about 15 hours a week. Sometimes more, sometimes less. I gamed a lot more when I was raiding top 25 in WoW but even just 3 days a week at 12 hours and needing to be on regardless of desire became too much for me.
As for the oily skin part; I definitely have oily skin. I don't have acne or anything like that, but my skin is definitely not dry. However, it is funny the above poster mentioned washing his hands. I wash my hands probably too much and I won't even touch my keyboard without washing my hands first and periodically doing so during sessions as I hate using my keyboard with anything but bone-dry/smooth fingertips. Hell, I just got done removing all my keys, scrubbing around the switches with a toothbrush and dusting the crevices with a q-tip.
I'm not OCD or anything, but I definitely take care of my stuff. Which is why the shine in just a year is concerning to me. Is there less chance of shine with the thick PBTs?
P.S. Thanks for the replies. I didn't know PBTs can shine and really appreciate the insight fellas.
EDIT: I'll get the keys that had the shine and take some pics. I took them off as soon as I noticed it and replaced them with my red PBT WASD cluster. I forgot I had them and it actually made the board look sweet with the back-light. I will take a picture of the Shift key now though.