Being an Android user, I'll say Android. I have to admit, it's still got one or two things to fix (e.g: VPN (PPTP) doesn't work), but apart from that it's purely amazing. It runs off linux, so once you're rooted you really do have a mini-server, as I like to call it, in your hands. It's easy to use, lightweight (software wise
), and has many good apps for any hosting company (PayPal, Control panel for cPanel, Twitter clients, IRC clients and the official WHMCS app)
As for games it has many, though I'm more interested in my emails, Twitter, facebook, host to want to play games, so I'm not much use there.
Really an amazing OS!