That "revenge is mine" feeling is one of my favorite parts of RPGs.
"What's the matter, horde of orcs? You beat me twelve times when I was level four, why are you scared of me now? Could it be fireball? Oh I see it could. And what is this little stick I'm carrying? Still a nonmagical quarterstaff? Oh, wait, dropped that when I picked up the Wand of Lightning Bolt."
I wasted many many of my childhood days playing that game, and feeling the rush everytime my hoard of ants took down a huge freaking spider.