I use Ubuntu. In a past life I was strictly a windows user. The thought has crossed my mind to switch to a mac because of GUI nav speed and peer pressure. It's not that trendy to haul around a 17" Dell XPS with a big power cable to a coffee shop or ruby meetup. Luckily I realize that those good with macs could be equally fast on Ubuntu with practice and being trendy is overrated. It's all about getting things done and I like having a big monitor + power.