I have a filter, which I use regularly at work, containing 88 users/communities/feeds, and I'm finding that I'm using this filter more and more for general browsing at home too.
This tells me that my friends list is too big to manage.
I will, this evening, be cutting my friends list down considerably, by removing communities that I don't participate in, removing feeds that I don't really read, and by removing users whom I don't really interact with.
If you find yourself gone, and you'd rather I added you back - particularly in view of the fact that I will be posting friends only more often from now on - then please let me know.
This is not personal, it's practical. :o)