I wish I had that problem, where I accidentally made rules lite games. All my stuff keeps getting away from me with scope-creep and self-bloating.
What I want to see or not see if a bit vague. That's like asking "What is your favorite solid object?" with no other criteria. In context of what? Chargen? Combat? Stats? Skills? Movement? Magic? Dice rolls? System mechanics and task resolution? Races? Professions? Equipment?