Your list looks amazing already Drewski
Umm.... that foreplay is hot, even if 'innocent'!
I don't know if this is within the bounds of your girlfriends comfort level, perhaps not, but at some point, playful use of a blindfold could be fun.
Maybe just while you trace letters on her back as you mentioned, in a playful manner, it could be non-threatening, fun, and quite exciting for her.
You have some great ideas, and I think you're awesome for not pushing the below the belt stuff. It'll come with time.