A good point regarding trimming was brought up. Not only can I slam three or four gears in one shot, which is great in a tech climb or a sprint, but since I am a single speeder by nature I tend to mash the big ring alot, so it helps alot with trimming when riding in the illegal/cross chain combos, I can trim out the front derailleur so it doesnt rub.
In the end of course you have to use what works.
Finally, my final Kudos to grips, is that you can never smash em against a tree and break em. With triggers there is always that chance that you could break one out in the middle of now where, with grips those chances are significantly decreased. When im deep in the backwoods exploring in the unknown I like no nonsense bomb proof equipment.