I would imagine a wrestler, working in the indie promotions would aspire to be the top champion of that particular promotion, but once called up to the WWE its a completely different lifestyle. The midcard wrestlers have to travel far enough without appearing on talkshows, or posing for magazines or getting memorabilia created for them. I'm sure for the main event guys like John Cena or The Rock, even people like Rey Mysterio who is a recognisable face probably has a difficult work schedule due to most people being able to recognise his face, even if they're not a fan of the WWE or wrestling as a whole. For me its not only guys who are in the main event, its the Kane's, the Rey Mysterio's who have a recognisable face (Or Mask) who are going to have the most difficult time with life in the WWE. The reason being they are recognised outside of wrestling.