Power Chords on Acoustic Guitar

I just have an acoustic guitar. Should I bother learning "power chords" with it? They sound is crapy on it, though the fifth string ones below the fifth fret sound better then ones played towards the neck on the sixth string.

Not sure what you mean by crappy, but I find that some heavier stuff that if predominantly power chords sounds great on an acoustic... One day I'm gonna do an acoustic version of Rock You Like a Hurricane...

I think this is a case of having some distortion or effect present and the tonal quality heard through an amp, rather than the clear sound an acoustic produces when sounding power chords I usually palm dampen at the bridge which gives them a 'meatier' sound on my acoustic.

I should of said sounds worse then when played on an electric guitar.
I just tried them once, and they are very easy to remember and play, esp the two string versions. Three string power chords at frets near the nut are difficult to do without practice.

Like someone else said, just something else to learn (and have fun with).

I guess I'll be the contrarian here. I think you should learn barre chords and not waste your time on "power chords."
Here's why:
A friend of mine learned power chords back in the 80's. Other than a few leads, it's still all he knows. I jam with him because he's my friend. I have a lot of other guys I jam with that I have hooked him up with and they refuse to jam with him a 2nd time. It's because he doesn't know his chords and can only play power chords.
Before I hooked up with this guy I had no idea what a power chord was. Once
I saw what he was doing I was instantly able to play exactly what he was doing (I simply played open E and open A barre chords but only 3 strings).
I tried to show him a few Beatles' songs but he started complaining about those Beatles chords. I had only attempted to show him a D7, the 3rd chord I ever learned. Do yourself a favor and don't fall into this trap. IMHO you can't spend too much time on chords, they are the backbone of the guitar.

it would probably be a better idea to learn the basic open chords first, and the notes on the first few frets of the fretboard. Power chords have their place, and can sound very good on an acoustic.

learn them, but not as a prime objective.