Eastern vs Western Mexico?

Ok, I am thinking about going for vacation to Mexico. But my problem is that I dont know where to go. What part of Mexico is better- Eastern vs Western Mexico? Let the game begin. So please give me your honest opinion about this two locations. I except every suggestion and judgment.

Eastern vs Western Mexico. Interesting fight, I must say. I dont understand what your plan is. Do you want to travel from place to place, so because that you are thinking between this two. You didnt give us any clue in what city would you like to go. It is much easier, to choose cities, than regions. Or you want us to pick one region, and then you will pick some city. Ok, no matter. I am definitely for Western Mexico. Or, I better say Acapulco. It is wonderful place, and it is great to spend vacation there. I had marvelous time there. If I have chance to go there again I would definitely go.