1) How much hashpower do you have?
I have around ~ 135Mh/s, on about five GPUs, nothing huge.
2) Costs to operate?
With this question, I assume you mean power costs. I pay $0.063 per kilowatt, which is a pretty good deal.
3) What do you do for summer heat?
I live in the Pacific Northwest, and I live pretty close to the water, so I max out around ~ 80 degrees, which means that it doesn't really get hot enough for me to worry about summer heat.
4) Have you experienced negative health issues from mining in your bedroom?
No, I mine in my garage, and I monitor the rigs remotely using HiveOS.
5) Did you heat your home with it during winter?
I live in a pretty moderate climate, so I usually don't heat or use A/C in my home. If it gets cold, I'll just put a jacket on.
6) Are you an OG Miner from 3 years ago or did you just start out after the first big crash?
I started mining in 2014 on a single Radeon HD 7950, but I wouldn't consider myself an OG Miner.
7) Were you surprised by the mining earnings for January/February?
No, what I have been surprised by is the rise in difficulty for Ethereum considering that GPUs are basically unobtainable right now.