I eat sardines daily for lunch when I'm maintaining and love it. Never get tired of it. I'm also eating a fair bit of frozen fish, too, and salmon we've caught (last night was the last filet in the freezer, so sad
I don't think you're crazy, though I know if I ate enough of it I could still gain weight. It's a great dietary staple, along with things like sea vegetables and nuts seafood is a nutrition powerhouse.