Luckily I have rarely noticed the menu button on the bottom, but personally I think removing the menu key from the mainstay of buttons was a mistake on Google's part. Back, Home, Recent, and Menu should have been a constant. That is one thing (of many) that I liked with Android over iOS. In Apple apps there was no constant to where the hidden menu functions would be. You have to look and find the button. With Android (up until ICS anyway) there was always a constant capacitive button that you knew exactly where it was. On my GNex that was the first mod I threw on it, a constant menu button beside the 3 main buttons. If Google were to say the menu should be in a defined location for every app I would be OK with it, but they can't even do that with their own (Gmail, for instance moves it around while you're in the app). But all that being said, the only time I notice it within the DNA is when I'm typing. I have to adjust my fingers up if the menu key pops up on the bottom, and move down if its not present. I don't play games on my phone because I'd rather not waste battery on my phone for games, that's what I have a Nexus 7 for.