You should learn to be happy with what you have. Besides, the fact that I'm not a huge star has allowed me to pick and choose the roles I want to do, not the ones some person sitting in a studio office thinks I should do.
There is one common thing in superstars - enthusiasm and humility towards their work. Off sets, they are big stars for others, and they carry themselves the way they want to. When they are working, they are not stars.