Whenever I was linking to my own site, I’ve been using relative URLs. Relative URLs are shorter and they don’t need to be changed when site moves to a new domain. But, it seems, there are numerous problems with RSS feeds and software that aggregates them. The main issue is that most RSS aggregators are rather stupid and don’t know how to convert relative URLs in RSS feed items to absolute ones. This causes far too many people to swear far too much. So I decided to switch to absolute (full) URLs from now on.
Changes of my domain changing are too slim too.