I did play it actually! I'm doing a chronological playthrough so I went with Reach > 1 > 2 (partial) > ODST > 2 > 3 and now 4. And yeah, I agree it's closer to what I like in Halo media than the mainline entries. It was fun but, unfortunately for me, I'm playing on Heroic so gameplay (or health) wise there's not much difference between playing as a spartan and ODST. Presentation and story did their job though.