(Travelers beware; travel may cause the following troubles in your life.)
The trouble with travel is that it will bring you out of your comfort zone. You will be surrounded by strangers whom you will have to trust and rely on to help you throughout your journey. You will be required to communicate with these strangers by charades, sign language, miming, and/or by learning a new language. Just imagine how horrible it will be to pick up new languages and to improve your communication skills!
Throughout your travels you will come across fellow travelers who will force you out of your shell. They will ask you about your travels. They will want to hear of your experiences. They may want to know about your homeland and what it is like. You will find that it becomes easier to approach others to find out this same information. those strangers I discussed earlier? ...well, it will also become easier to approach them as well. You will eventually come to the realization during your travels and interactions with other people along the way that people would rather help you than to hurt you.
The trouble with realizing that people would much rather help you than hurt you is that your perceptions and prejudices go out the window. You will become more tolerant of people from other backgrounds, religions, and cultures. Basically your human interactions will increase and your skills with those human interactions will improve.
Another trouble with travel is that there will always be some level of difficulty along the way. Finding a place to sleep, deciding what to eat, dealing with changes to your transportation, being lost, etc. How would you currently deal with such stress? Your problem solving, and anger management skills will improve because you will need these skills while traveling. Transportation isn't always reliable or fast. I know I have issues being impatient. Are you impatient? It won't do you any good. That bus won't come any faster and nothing else travels fast than the bus...what else can you do but relax and enjoy where you are?
Basically the trouble with travel is that you will improved your personality, better your communication skills, gain more tolerance towards other people and cultures, and improve your problem solving skills. I hope during my travels I run into all of that trouble so I can be a better person altogether! Try it yourself and see if it holds true!