Arch tends to keep configuration formats and file locations between major versions. I've found that with Ubuntu, simple things like mouse button config change drastically between versions. I love Arch on the server but Ubuntu is just too easy and has so much software available for the desktop.

For the last few Ubuntu versions I start with Ubuntu Minimal (30MB instead of 690MB) to avoid all the extra noobuser bloat that comes with Ubuntu default. This way I have a clean installation similar to Arch but without having to hand-configure everything.