I entered the game striving to kill Azmodan and only level 29 and decided to be timid and use Monster Power 2. The XP gain was greater and after I killed Azmodan I had hit level 31 and was well on my way toward the final act. My Barbarian uses a build where REND gives him health back as he fights. So far it is quite interesting but many times I was close to death. One day I will get the nerve to make a HARDCORE character but what class I am not sure.
I racked up 5 more achievements as well and now I want to play more than I used to. I felt the game on Normal was a tad too easy but now I want to jack the Monster Power up to about 5 or so with my wizard and see how fast I can level him.
It does bring some fun back into a game I was seriously disappointed in. Despite how good some claim Torchlight 2 to be I just don't have the gusto to play it at the moment. With RIFT taking a lot of time Diablo 3 is one thing I want to finish on Normal then move on. I am really not in the mood to grind gear in that game.
"Monster Power gives Diablo III players the option to increase the health and damage of monsters according to different "power levels" -- and in return, they'll receive scaling bonuses to their adventure stats (including experience, Magic Find, and Gold Find) as well as more drops.
The option to adjust Monster Power will be available to all players starting at level 1 through the Quest Selection window, and can be adjusted separately for Normal, Nightmare, Hell, and Inferno difficulties."