It is a hard question to answer. Given the circumstances, I try to choose what is more suitable. Finding the right group to travel with is very important. Traveling with friends is not always a good idea. Often, very good friends or close family members are not necessarily good travel partners.
Australia It depends where I am going. I feel fine traveling in the US — my home country — by myself, but, in China, I like to have a friend nearby in case my language skills are not good enough, or something like that. Two brains are better than one in that kind of situation.