Dilly, I get bloggers' block regularly, and when I do I do a list type post, like today's, or join a bloghop. My blog doesn't really have a theme though so I can put what I like really.
As for comparing my blog to others, I used to do that, and now figure that our blogs reflect us to a certain extent, and we are each unique. So witter away about nothing when you feel like it (my entire blog is pointless witterings) and make the most of the moments when you are really inspired.
What are any of us adding to the world really? I guess we are just putting out our opinions, rants, craft work, and wondering if anyone would like to listen to them. In the past you got these kinds of things from magazines, newspapers, where people are paid to write. And it wasn't an exchange - blogging allows us to exchange ideas, opinions, and get viewpoints on all kinds of things from lots of different perspectives.
I am not a crafter at all but love your blog (and some of the other crafting blogs on here). I would never go out and buy a crafting magazine as it isn't my niche, but looking at the blogs has opened me up to another world - and anything that makes us think about something different is a good thing right? It's like being a nosy neighbour and going and having a peek at other people's business. It's fascinating, and fun, and free. Win win.