I enjoy chasing the achievements. For me back in the day I did all the achievements to get Hayabusa armor and then did the vid master achievements to get Recon. So for me, I got to do all the challenges back then and enjoy the reward for being that good at the game. I was saying to one of my friends that I wished that you had to get an amount of achievements to get the armor and that I wished it wasn't handed to you, but it doesn't bother me since I've already done it all before.

Am I the only one who really wishes that 343 had kept the challenge of finding skulls rather than just making them all available to the player at the start of the campaign?

If 343 hadn't given us the entire arsenal of skulls from the very beginning without us having to find them, then new players or those who forgot the original locations of the skulls could still entertain themselves with the side-objective of finding skulls during a level, and that, of course, would make the game more enjoyable and add to the replayability.

Alas, poor Yorick! I knew him, Horatio, a fellow of infinite jest, of most excellent fancy.