Yeah it's my pick for the best as well.

The whole "doomed last stand" concept was really compelling and as Bungie's last game their core gameplay was at its best.

I bought it on:
* OG Xbox.
* PC.
* Xbox 360 - Anniversary.
* Xbox One - Master Chief Collection.
* PC - Master Chief Collection.

I am down for buying it and playing it again on launch. 
Been supporting every Halo release in the hopes for a new decent game or a remake of Halo 3... Or hoping to see a few Xbox Live accounts from 20+ years ago come to life for that one last match.

Halo 3 for me. I never did replay Reach after I completed it.

Halo 3 was just different at the time.
It spent over a year as the most popular game on Xbox Live until CoD dethroned it, it sold gangbusters, it had great visuals for the time.

I play Halo for the campaign, so I honestly found 3 a bit underwhelming; it was hyped up at the time as this unbelievably epic finale but it felt more like a series of skirmishes. It's not remotely bad mind you, but I liked 1, 2, and Reach more.

Halo1,2 and 3 for me. While I enjoyed Reach, I barely finished it kinda got bored. I only bought Halo once but played the heck out of it so I will definitely get this remaster. I am just hoping that its giving every attention it deserves.

I got annoyed with the Cortana interruptions in 3.  

I only play the campaign as well, granted coop with the wife.