Nope. Halo 1 was phenomenal at the time it came out, but Halo 3 and Reach are the best even today.
Ok, maybe I should say I literally never played a Halo game until last April, and since then I've played the entire series except for Halo Wars. I'm also stating my opinion of the games based on campaign, since that's what I play 90% of the time. Graphics and superficial things like that aren't a concern for me, but overall I just didn't find Halo 1 all that fun and replayable.
If I had to rank them all, it would be 3 > Reach > ODST > 4 > 1 > 2. That's just based on how much I feel the urge to play each of them.
GT: ColossusCHD, playing Halo 4, ME3, BO2 If you're not a player, then you're gonna get played.