Do you find the time to write serious substantial posts in each one or end up abandoning one if you have 2+? I have too many interests to keep them all in one blog, but don't want to have a dozen blogs and lose control of them either. What's your best strategy for blogging?

BTW I paid for one of those 'review my site' blog entries today and you know what the person did, they copied and pasted a page from my site and called it a blog review - and they get at least $20 just for that! I think I got ripped off, not sure whether those 'paid to blog' servies are really genuine.