There's been a few that are definitely tied for first.
One that's coming to mind was the Monster Mania convention I went to in May 2006.
It's a big horror movie convention, and I was there as part of a horror movie website I was working for at the time...and it was just really amazing to meet/interview/hang out with people like Lance Henriksen, George A. Romero, Jeffrey Combs, Tony Todd, Bill Moseley, Sid Haig, Doug Bradley...and others.
Plus, I got laid.
And that's usually a lot of fun.
For me, anyway...
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