I never touch the buttons. I use the touch screen. Am I missing something?
The square button (Second from the bottom I believe) is wonderful, it cycles through common screens... So while riding if I wanna get to the MP3 page, I don't hafta (dangerously!) click menu, then try to hit the music icon, etc... I know I just hit the square button 3 times and I'm there, then hit the Back in the lower left and I'm back where I'm at... So yeah, you're missing something IMHO by not using the buttons...

Play with 'em, you'll start to learn the sequences to get to the places you wanna get, and IMHO it's a lot easier and safer hitting those big side buttons a few times as opposed to fumbling through the menus with gloves on.