I receive notice of the blogs I follow either in my email or in my Reading List on Blogger. I usually read them that day. I comment if I notice something particularly interesting, but not all the time.
Having missed almost 6 months of blog reading, I'm now in the unusual position of being able to read all the sequential posts from one bloggger day after day or week after week to atch up. It is givivg qme quite a different impression of those blogs. You get glimpses into a blogger's life the first way, but you get to follow the story of their life for a while the other way.
For example, I'm currently catching up on Al's 'Travels with the Bayfield Bunch, one of my favourites. In March they were driving their RV home from the south. Reading it this way lets me follow their whole trip day after day, which I really enjoy. I'll probably put in one great big long comment at the end.
Soon I'll get to some of all those other blogs out there awaiting my attention.
As for readers commenting on my blog, some comment rarely, others comment if I comment on their blog. And finally there are those of you who comment regularly regardless. You're the ones who have kept me going these long dark months. On reflection, I'm going to read more blogs sequentially rather than as isolated posts, and I'm going to try and be more generous in my comments.