Visually, Master Chief, sports one of the most boring suits of space armor I've ever seen. I coulda thought that up when I was 10.
He's not that interesting of a character at all, so I don't understand all the hype behind him, or consequently, the games. I mean, they can be fun... but they're not THAT fun.
On a side note, aside of the various Sith garments in Star Wars, nothing beats Samus's power suit design. It just looks too sick.
Sorry, off topic.