Here's a one-pager I wrote ages ago that will probably tell you if you like GUMSHOE or not.Your replies are very thoughtful, and I appreciate your insight. I am still looking into Gumshoe as well, but haven't played any yet. How was the reception of the Gumshoe system?
I personally like Starfinder. I'm also a big fan of Coriolis (by Mophidius, I think?), Save the Universe!, and Ashen Stars.