I've been a Bloglines user for almost a year. I needed a portable aggregator because I use several different computers. Then a few months ago I got a TabletPC. Now portability isn't as critical since I always have my Tablet with me. I stayed with Bloglines though because none of the client-side aggregators I tried before worked for me.
I just downloaded the latest version RSS Bandit. I love it. It is much more polished than it was the last time I tried it. Combine that with the dasBlog integration and the upcoming SIAM support and I'm in hog heaven. Thanks Dare, Torsten, and everyone else that helped make RssBandit what it is.