Boras-style greed (as it's perceived) is a turn off to most. Since 99% of the population cannot relate to the high stakes involved, most people take on an attitude that "these guys get millions to play a kids game - they should just suck it up".
I'm a contrarian to a point. Guys that maximize the cash-grab as if that's their championship ring are a turn off to me. A-Rod had me (and my father who knew him and interviewed him many times) fooled in that respect. Guys who want to be paid market value? I have no issue with. Guys that give a discount to teams in order to accomplish goals other than money have my admiration. Guys who play for far under market value (willingly) may have the admiration of many fans, but also have to understand that they affect market value for others.
Each player has to decide what fits within their goals and choose which goals are most important, since many might be somewhat mutually exclusive. I think it's a tougher balance than most on the outside realize. I could write a ton more on this, but just don't have the same kind of available time to post as I used. Great article (again) Jeff.