i have really enjoyed dark reign, mainly because the beginning of the reign was when i really started reading comics (aka: got addicted to them) and i have bought a lot more dark reign stuff than blackest night stuff, on top of that, its more realistic, it gives the marvel U an even bigger dose of the realistic tone it has for me, and the absolute best parts were the Deadpool tie ins (specificaly the part where wade became the meat, lol), and i really liked the list issues, especially avengers, the hulk, wolverine, and spider man (the others were above average, except for secret warriors, that was my least favorite list issue)
 
but i can't deny how it has consistently disappointed me, secret warriors is boring as $#!T, Utopia, although it started out amazing, and ended with pretty sweet issue, just dragged out for the middle four, when nothing really happened, dark wolverine was a let down, and dont even get me started on how crappy dark avengers is
 
blackest night however, is awesome and it has never disappointed me, i rarely buy DC stuff, but i can't wait for the Blackest night Tpb