I've never blacked out on occasions where beer is the only thing I drink. It's always rum, vodka, tequila or whiskey that do me in. It hasn't happened in quite some time though. Last time I blacked out was while tailgating at the 2012 Miami game. Started pounding screwdrivers that were 50% vodka at 6:30 AM on an empty stomach (buddy said the food he was grilling would be ready by 7:30 but it wasn't done until 9

).
While blacked out, I apparently pissed on the side of my roommate's truck right in front of his girlfriend and then puked a little on my shirt. Roommates changed me into a K-State hoody that was sitting in the truck and it was one size too small for me. I also applied sunscreen to my face and neck. My friends all got sunburned after mocking me while I drunkenly applied sunscreen, joke was on them. There's about a 90 minute span where I don't remember a rough ridin' thing, but my brain was pretty boss. As soon as the Qatz lined up for kickoff, it turned back on. I clearly remember the entire game. Don't remember the teams taking the field or the coin toss, but my brain recognized kickoff and knew the shenanigans needed to stop. One of the most perplexing moments of my life occurred during the second quarter when I noticed I was wearing a hoody. Spent a good 10 minutes thinking hard about when I put on a hoody before finally asking my roommates why I was wearing one.
Anyways, TL;DR moral of the story is that blacking out leads to fun experiences and lasting memories and you should do it more.