Are so many picking Elizabeth Warren because she graduated from and taught at the University of Houston? http://www.uh.edu/pride-stories/Elizabeth-Warren/index.php I picked Fightin' Joe Biden.
Warren and Sanders are the only possible candidates who stand even slightly outside the realm of plutocracy and corporatism. Sanders will probably run as an independent as a bully pulpit for populism. And I can vote for him in Texas because my vote doesn't count for squat.
People pick Warren because she doesn't seem to be corrupt and might actually lead the country in the best interest of it's people and not it's corporations.