I have a couple of nominations.
First, for myself, in the following fields:
Music: Guitar
Music: Drums
Music: Digital Recording
Music: Production/Engineering
I'm a 20-year-plus musician, with "pro-amateur" experience in the above listed categories; I play drums in two bands, guitar in another, and am currently in the midst of recording and mixing yet another album of many.
Automotive: Porsche
Automotive: General Maintenance
Automotive: Autocross
Automotive: Track Days
Automotive: Tires
I have owned a 911 for six years, maintained it, tracked it, and even killed Bambi with it.
Secondly, I'd like to nominate Cheater for:
Parenting: Teenagers
Parenting: Young Children
Parenting: Twins
He has a teenager in college, and young twins. That should be enough. Also:
Automotive: Toyota MR2
Automotive: BMW
Lastly, for Fraggle:
Food: Twinkies
Food: Gathering
Food: Consuming
Food: I WANT MORE