Calling it a "Serious question" is pretty funny when the whole thing was a hobby day either way. You had a free Saturday and two fun choices, that is not a life crisis. The Tut show is a traveling exhibit that will come around again in some city, but that pottery shard came out of the ground once and you were the one holding it. So yeah, the dig was the better pick, no question. The jealousy will fade the second you stop looking at your buddy's photos. It only feels like a trade because you let other people tell you which one was supposed to matter more.