I've found openID to be far more painful. I decided that I just can't risk making my Google account more powerful in case it gets suspended (for whatever reason, valid or not). So, what a pain to research how to make it work, what implications there will be, etc. I was very excited to try Stack Overflow's software, but it requires an openID and I just haven't gotten around to deciding what to do.
This is easy to fix, just make your OpenID your own domain, or a subdomain of it (http://id.example.com/). The OpenID standard lets your delegate to your provider of choice with a couple of link tags. If it gets shut down or you find a better one, just switch. The websites you authenticate to won't care.
