But how is he playing "Tom Cruise"? Surely that would mean everything is either biographical on him, or he takes his personal life into work with him on every set and uses it in every character. His characters are not, as some people NOT ME perceive him as, a Scientologist, attention demanding, cradle snatching, publicity hungry, gay guy. If that were the case in all him movies then you would be right. You obviously haven't watched enough of his movies to form a judgement. If you're saying all his roles are the same you've probably only seem his romcoms like Cocktail and Jerry Maguire.
You can't compare the role he played in Born On The 4th July to the role of Jerry Maguire. Two completely different roles.