It provided a different and bleak scenario from what we are accustomed to in the Halo series. The setting was gritty and each level presented unique challenges. At first, I hated Halo Reach as well, I thought the enemies were overpowered (I play on Heroic by the way), but with the right tools and strategies, you learn to be an efficient killing machine. In terms of level design, nothing for me will ever surpass "Long Night of Solace". A classic beach head assault followed up by an incredible vehicle section, which was further followed up with the boarding of a Covenant ship. Don't even get me started on the ODST level. Reach was the culmination of three incredible Halo games in my opinion.
this Reach's campaign is amazing and I really love the setting