Halo Reach. How much better than Halo 3?

I liked Halo 3, but it never really amazed me. It took me a while to get into the multiplayer, and I didn't find the campaign any good at all. So is Halo Reach better? If so, in what way?

weapons are more balanced, more customization (armor, game types, maps), abilities like jet packs and armor lock add more elements to game play, match making firefight mode, matchmaking campaign co-op, more game types (headhunter, stockpile, invasion), bigger multiplayer maps, better community (nobody is screaming at you because you costed them reaching a level 50, :P)

It's actually worse than halo 3. But it is still halo, so it's still fun.

I wouldn't say it's better or worse. Just different.