I have many:
Art
Artzone
Photography
Steem
Steemit
Gaming
Nextcolony
Ocd-resteem
The last one I love most, because for some quality posts I got appreciated and this was motivating to continue.
The second is photography, because I love to create photos
The third Nextcolony - because I have hopes for this game to be awesome and bring more value to Steem as platform
:-)