There are varying levels of drama when it comes to travel. There's the stressful itinerary and planning aspect that relates to catching your flight on time, or dealing with lost luggage, or arguing with a stewardess over a missed connection, or realizing the hotel does not have your reservation saved, or discovering the tour you wanted to do has been sold out since January. Those are all scenarios we have dealt with and are prepared to deal with if they happen to arise. But then there's the unforseen drama of travel, the experiences we never see coming. These usually involve travel companions or acquaintances we meet along the way, and they can usually cause more anguish and turmoil than an unfortunate shift in plans, because the drama is always personal.
Second, personal agendas. Everyone has activities they want to do and sites they want to visit, but the reality is that a group trip is not all about one person. If you have travel buddies, you need to respect that there may be things they want to do that you do not, and vice versa. Sometimes there are two extremes, with one person wanting to spend their vacation relaxing, no agenda necessary; and the other scheduling one event after another hoping to keep every minute of the day occupied with something. This can create some real problems, and in those cases, it's best to go your separate ways, even just for a day. Otherwise, neither one will get what they want out of the trip.
These are some of the most common dramatic events--at least that I've experienced. And I can only hope that my next two trips will be completely drama free. If not, the best thing to do is roll with the punches, and make every effort to avoid a ruined vacation. But overall, I have found that traveling with friends can be one of the most memorable experiences, and nothing should interfere.