I have been an everyday RSS user for a few years now. Jumped around trying Bloglines, a few desktop clients, Google Reader, some unknown smaller sites, etc over that time. Finally I found my perfect aggregator and have been using it daily for about 8 months now. I even took it upon myself to donate a few bucks to developer.

Simple, free and open source: http://rsslounge.aditu.de/ Only catch is it requires your own host/webserver with PHP/SQL and a quick installation. But well worth it for me as I just dropped it onto one of my websites.