My first D&D experience was when I was 8. It was diceless of all things (because the DM forgot the dice) so it was entirely DM fiat, for everything.

I rolled up a 1st level M-U in a party of 3-5th level characters. We promptly got captured by a high level evil Druid who was master of the giant stone fortress we were raiding (no idea…)

Every escape plan we came up with to get out failed (pick locks, fail. Bend bars, fail. Potion of gaseous form, it worked but then he just recaptured us in a jar, fail. Tunnel out, fail.)

Eventually the other players got bored and decided to kill me for fun. They killed me. Then buried me. Then dug me up. Then tortured my corpse, then the Druid raised me so they could kill me again.

I was totally hooked.