What makes a good travel buddy?

I've traveled all over the world with different people for work and vacation and I've learned what makes a good travel buddy and what doesn't. I can tell you that in one trip I will know if you are or aren't a good travel buddy or not.
A good travel buddy is relaxed and a passive adventurer. A good travel buddy will walk the back alleys of Stockholm/London/Munich/Hong Kong without question. A good travel buddy will rent a car and drive across Ireland and hike the moors and coastal cliffs just because they are beautiful. A good travel buddy will take a train to an unknown location in a country where neither of us speak the language. A good travel buddy will climb a pyramid with you even though they are afraid of heights. A good travel buddy will open the farmer's fence gate so you can drive the jeep inside and park it. A good travel buddy will hike across the farmer's field to see the waves crashing into the cliffs and have lunch. A good travel buddy will hike up the rain forest cliffs on the farmer's property to see the waterfalls that few have ever seen using a map drawn on a paper napkin. A good travel buddy will hike down cliffs to see the most beautiful isolated beach in the world and will talk with the farmer that owns the land and the self appointed keeper of the beach. A good travel buddy will not question turning onto a trail at the two rocks on the side of the road to go down a mountain to secluded beach and swimming hole. A good travel buddy will take a ferry to a remove island to hike the mountains to a fishing village and then eat seafood that was alive 15 min before it was served. A good travel buddy will fly with you to a country that is not your destination, just to get closer to you destination. A good travel buddy is not afraid to venture into crowded streets and back alleys with thousands of other people packed like sardines. A good travel buddy will help you select pork and beef that has just been slaughtered at the weekend market. A good travel buddy will go with you and the gardener to haggle for fresh seafood at a fishing pier where only the gardener speaks the language. A good travel buddy will help take another travel buddy to the emergency room in a foreign country and not panic at the sight of pre-WWII medical equipment. A good travel buddy will help you rescue and stabilize an injured person until 911 can respond without panic. A good travel buddy will break the local laws to watch giant turtles lay eggs on a beach at midnight. A good travel buddy will spend a week in a goat shack and make the most of the situation and help make fabulous fresh meals each night with produce purchased from the front yards of the locals. A good travel buddy will drink a coke and talk to the patron of a shack without noticing that it is the local porn shop. A good travel buddy will go through back streets to find a tiny three table shack that servers food and when you order, the owner send the children up to the house to fetch the dishes to serve an unknown meal. A good travel buddy will go to a tin shack to have a 20+ course meal of road kill served on plastic table cloths. A good travel buddy will hike a rainforest using a 1950's topological map not knowing if it is accurate or not. A good travel buddy can alway figure out how to brew a pot of coffee. A good travel buddy will always get you home safely after you had too much to drink. And when it is time to relax, a good travel buddy can sit on the balcony or beach and read books or play cards until the sun sets.
A good travel buddy is willing to go just a little bit outside of their comfort zone for the experience of the location and we are all better because of it. They are not frightened by the third world. I have only been frightened by my location twice and both were in the US; once in China Town DC before it was rehabbed and the other time was in New York near Columbia University before it was rehabbed when a made a wrong turn walking to my hotel. I have been in some shady places but they never frightened me. A good travel buddy is not going to be frightened poverty in the third world.