For my free time, I want a system that stays out of my way. When I'm done with work for the day, and I want to hack on fun projects in languages from C to Smal

For my free time, I want a system that stays out of my way. When I'm done with work for the day, and I want to hack on fun projects in languages from C to Smalltalk to Lua to Scheme, or communicate over various chat protocols and IRC, or do any kind of reading or writing, i do it in OS X.