Folks say you should spend time studying past games to learn weaknesses but I feel like that's as bad advice as is asking children to grade their own homework -- it will simply reinforce bad ideas.
Still, I enjoy it. Mostly the self-paced puzzles. I'm hovering around 1200-1300 there (on lichess).
Are you using an engine to analyze your past games? It is much more efficient than using your own brain power to find your mistakes. If you think the games that engines show you aren't realistic (they aren't), then play out the opposite side of the engine yourself. That way you can see how to refute players of your skill level.
I don't know what percentage of high level play is memorization and pattern recognition vs calculation. I suppose pattern recognition instantly culls thousands or millions of branches from the decision tree, and the rest is calculation on what's left.
Of course it's good to have some practice on different types of tactics. You want to be on the lookout for knight forks in the beginning too.
Another thing that might help with your tactical vision is the chessable checkmate in 1. You can just drill that all day and its really great. You can feel your chess muscles flex (chess swol).
If you have trouble finding that obsession - you weren't that interested anyway. Let your mind decide what you truly enjoy and want to grasp. Listen to yourself