Cameron likes to play "what in God's name are you holding up to my face this time?" ... I usually like to find colorful objects and kind of "direct" him around his tank with it from the glass. I move it, he follows.
Winston's pretty passive, and is not a big game-player, but he does give me the occasional fish-face.
Tifa plays "staring contest" with me... He always wins. His lack of eye-lids seems to be the trick.
Damian... he's my newest so I haven't quite figured out what he likes yet.
And Nina and I have regular finger chase sessions.
Finger chase is the staple of our relationship. Don't mess with the finger chase. :)
Winston~ Damian~ Twitch ~ Evans