I don't think this is very uncommon. I know a lot of people seem to spend a lot of their waking hours generally "ruminating" on their coding work but only 5-10

I don't think this is very uncommon. I know a lot of people seem to spend a lot of their waking hours generally "ruminating" on their coding work but only 5-10 actually sat down and implementing the solutions at the keyboard. I also know people who can happily be constantly coding for 8 hours a day like it's a stream of consciousness, but I don't think that's everyone.