Believe me, I have had the same thoughts--many times--yet, here I am a couple of months into a new blog, my seventh start in about as many years.
And still asking myself the same question. As I start to build a subscriber basis, a readership, I wonder whether they want or need something from me every day. Probably not. Most people I know get plenty of email. It's not like they're waiting anxiously by the mailbox waiting for my blog post to arrive. Once a month and I think I'd lose any continuity in the effort. Once a week--I don't know--I probably have more to say in a week than would fit in a single post.
So, I'm thinking every 2 or 3 days might be just about right. And less pressure than trying to do it every day.
I'm also exploring having guest posts. I've already had one, and have another in the works. How about you? My email address is on the Home page of my website, and there is also a web-based contact form if you don't happen to be near your email client at the moment.