I was wondering what kind of stuff will ruin your vacation if you were taking one with a few friends? I just got back from a really bad Vegas trip with 2 lame friends. Apparently from experience, you find out the "true" side of so-called friends when you go on vacation with them. 1) Vacation friends that sleep at 11pm on a Friday/Saturday night while in Las Vegas or NYC, because they think it's boring. 2) People that do drugs and get high before and during the trip. Without any drugs, they ruin it for everyone else. 3) People that CANNOT enjoy life: having a drink once in a while, a smoke or a cigar, partying at clubs. 4) Jealousy, if they can't get/have it, no one else can. 5) Travel companions that do not want to spend a dime on traveling etiquette such as tips for bellhops, waiters and taxi drivers. anyone care to share their buzz kills from past vacations?