Hmm... interesting.
I'm completely the opposite when it comes to the articulating. I'm always certain about what Sanders is saying, and I can follow it clearly -- and I assume his colleagues can, too -- while Clinton tends to speak in clichés that lose meaning. The whole "reset button" with Russia is an example of that, and how her well-intentioned words don't add up to clear policy.
But perhaps the most important issue to me is Sanders' willingness to listen to groups like BLM and form the most comprehensive social justice platform out of all the candidates. The current status of American blacks is indefensible, and I think those racial issues are going to become more and more important in the very near future, as the number of people willing to speak up reaches critical mass. It will take a leader willing to acknowledge the outrage to do something about it, and I think Sanders is the one to do that.
I kinda feel the same way (as you) about her being the first female President. It'd be a nice follow-up to electing Obama (and I have a young daughter, so it'd be great for her to see an accomplished woman of high rank that earned it), but that's kind of a selfish desire for me, so it's not going to overshadow the other issues