I'm hiring a president to do a job. I want the person that is talking to have some credibility so I can trust him to do his job properly when he's hired.
Voting for who you want for President is just a small part of electing a President for the Country. The major problem is getting to the point that electing who you want is also wanted by others. You can vote to hire whomever you want but others may disagree.
So, look at what is going on in the cycle and make your choice intelligently.