Call me among the "let me see the results first" crowd.
I wouldn't be looking for an equivalent to E6 in terms of grain and fidelity, but if it is something with real character (e.g. the original Autochrome, which loses in the "objective" category but wins oh! so much in the "subjective" one!), then I can be a consumer for life.
Given that colour slide is now either Fuji or Fuji, anything new would be cool.
I would love 120, so that my 6x6 projector could be useful for the years to come. Even glass plates would be cool: that's why I got that plate back for my Rolleiflex! Shoot a square on 6.5x9, cut down with diamond, mount or tape corners, slip in trays, voilà!