I haven't been on here in quite awhile, and I'm glad to see your sculpin is still doing well! So big, and your tank looks great.
It's funny how personable these fish get, since in pics they look pretty non-interactive. Ours learned to recognize us and would swim at the front of the tank when we came near, and hop up on our hand voluntarily.
He also took to eating pellets more than anything else. He was still a bit interested in live fish, but he was too lazy and impatient to ambush them anymore, so he'd just swim up to them and scare them off, then give up, lol. Pretty smart though if you ask me. Why should they waste energy hunting if you're gonna drop pellets in their mouth?