DH and I have a combined one used for school, bills, the kids' activities. I have 2 others, one was for a little business my friend had but now is mainly for junk and the other is for a little side business I have (checked maybe once a week) and I have one that's just mine (I think DH has the password). That one is checked the most because it's synched with my phone. DH uses an old account that gets a TON of junk sent to it which is why I stopped using it and created my own. I hate when he asks me to check it as there's too much crap to go through.
I have 2. I check the main one everyday. The other is for junk email (the stuff you get when you sign up to win something and have to give an email address) and I never check that one- dh does (w/ my permission).
Yikes, lemme think about this for a minute. I have my main one that I do check multiple times a day. I have two for PTA that get checked daily, one is our PTA's generic email and the other is my president's email. I also have one for cub scouts, but I don't check that daily maybe once or twice a week. Then I have my gmail account, that I check every once in a great while. It is mostly full of junk mail at this point since I've pretty much abandoned that one.
I have 2. Why you ask...because my yahoo account got hacked and I can't get to it on the desktop! PITA!!! So I have yahoo so I don't have to switch everything and a gmail account for contact with teachers and email confirmation when I order something online