I didn't pay much attention about 1.6, but from what I've heard is basically the same with every update (with some exceptions); useless update with no redstone updates. Only thing i know about 1.6 is that you now need to download a completely different launcher in order to play minecraft again ._. But after using the new installer, i found a awesome feature, which is that the launcher keeps track of the conversations on the server! I find this extremely helpful, especially when you want to (for some reason) request a ban for another player. Just copy / paste the info in your launcher, instead op making screenshots, etc. Thoughts about the new launcher?
Why do i keep coming back? No idea.