All im trying to say generally riding is about having as much fun as possible, this generally means going fast, dealing with stuff coming at you, dirt, rocks, roots, jumps, turns, camber etc, etc. The more travel you've got the bigger the rock/roots/steeper the terrain needs to be to get that same buzz. By going for the more travel, you are limiting the amount of stuff you have to ride to get that buzz, ie limiting the amount of fun you're gonna have.
Then you have on the ups where longer travel will be harder work/more horrific, hence less fun, you'll get more tired too, meaning less climbing, in turn less descending. Then there's the stuff on the flat which will be left out on a longer bike which would be fun on a shorter bike.
Also, shorter travel jumps better and helps to make more jumps along the way, jumps are fun, right?
A shorter travel bike will be more fun more of the time, isn't fun the goal? Obviously everyones tolerance to what climbs ok and versions of fun are going to be different.
All i know is that im really really enjoying having a trail bike after having an am beast, im having more fun more of the time, fitting more climbs hence descents, and riding just as technical stuff (dh tracks) and jumps.