Dungeons and Dragons Online.
I like to play a Drow Paladin to get high saving throws, + a shield feat or two, + Intimidate to draw aggro, + Defender specialization. Throw in Smite Evil, and I can pull a decent balance of tanking and quick mage takedown, with a little bit of Lay Hands to endear myself to whoever I just boosted to full HP. Also, I like to have wands of Bull's Strength, Bless, and healing. Did I mention Smite Evil recharges over time instead of per rest? (I LOVE Paladins. Hell, one of their top abilities in the Defender specialization is called Glorious Stand.)
There was one time where we started off an instance bad. On either Hard or Elite, I honestly can't remember. Anyways, we had someone who wouldn't let the rogue do his job, so he got blasted by traps and rage quit. The rogue died soon afterwards - from a trap. We're down to 4 people now - myself, my brother, (wizard) and two clerics. Morale is low. This particular instance has tons of mages and tons of constructs - always a royal pain.
We struggle through these confrontations, barely keeping it together. We lose my brother (the wizard) and so it's me and two clerics - not exactly high damage dealers! Thankfully, we all brought wands of healing. I brought wands for every status ailment ever (again, endearing myself to the party) and my Use Magic Device is pretty high, so we save spellpoints and do our best. Still, we take a beating, and are low on SP by the time we near the end of the instance.
So, we're already dreading the final confrontation. There are only three of us, and we know we don't stand a chance against the boss. We round the corner, and then we see him. The boss. His two lackeys. And the (random) rare spawn that outclasses the boss.
Everyone dies a little inside. At the same time, there's no way we're going to lie down and take it. We charge. I remember just in time - I have some cookies from the Festivult that give me some sweet bonuses, at the cost of being able to cast spells. I have no spellpoints. This seems fair to me. I chow down on anything that looks beneficial. I spam Intimidate.
I despair.
The clerics are barely keeping me alive. My Lay Hands is soon expended. I am literally backed into a corner while the rare spawn is pounding away at my shield and I watch red numbers rack up over my head. I can't see anything, but I think the lackeys are hitting me too. I have no idea how I'm staying alive - the clerics have their hands full already, and they have no SP - they must be spamming wands of moderate healing, maybe major. This goes on for probably 20, maybe 30 seconds, but it felt like hours. I realize I have some cookies left in my inventory - they're on a hotkey and I have no idea what they do.
I push them all.
Meteor Swarm! Robot Dog Summon! Spell effects fill the hallway and I have *no idea* what's going on anymore. Time speeds up and I smite wildly, abandoning all hope of defense. And then it's over. We're all alive, standing there in disbelief. I have no idea how our enemies died - I certainly don't remember killing them. Maybe the cookies did.
I was mildly addicted to DDO before that occurred.
From that point on, I was hooked.