For me? · Rails 3 became everything I wanted Rails to be — I've come from Django and am really loving the ecosystem and the way the documentation has matured.

For me? · Rails 3 became everything I wanted Rails to be — I've come from Django and am really loving the ecosystem and the way the documentation has matured. · Varnish — just an awesome piece of software. Fantastic job of caching, from small sites to large, without having to write mountains of config files. It's something you can drop it from an early stage with little cost in time, and know it'll be ready to help an application as it grows/scales. · SSD's: didn't realise how good they were until I got a machine with one. I don't think I can buy a new machine without one now.