Cause I've been looking for one.
Only ones I've really looked at are Sharp Reader and Thunderbird.  Feed Demon is apparently adware so I'm keeping away from that.
Unfortunately, neither really offer enough options for my liking.

Thunderbird, you cannot have different update periods for different feeds.  Also, it's "web" rendering seems a little overkill - I have some feeds which have an iframe, and TB loads them, which makes things really slow.
Sharp Reader does allow you to have different update intervals per feed, and also doesn't display the iframe, however it still retrieves images in feeds, and there's no option to disable that.  Also, very few controls over how it uses the systray.

So if you're using an RSS reader, what are you using and what would you suggest I try?

Thanks.