Just collated all the domains I have registered, across three different registrars and found out that I personally own 14 domains. I know I'm a supergeek, but maybe that's a bit too much 😀😎😛😊
Here is a breakdown of the TLD's and how many in which TLD: com:1, de:1, is:4, link:1, net:2, org:1, us:4