Tilone: My Main Guy Ti, Tilunatick, Loonartoons

Roland: Da Be Be, Sweetheart, Baby Boy

Loophole: Loopie Good Girl, Loopin-Yay

Precious: Presh the Presh

Fledermaus: Hiss the Piss; Pissy (she's a truly evil cat)

Buffy: Sweetling

Timmy: Tim-May (in my best South Park imitation)

Spyder: Spitlins

Boodah: Boodah-poo

Spike: Boogie Boy

Moo: Moo-Da-Boo, Moo-Da-Lovely, Moo-Da-Kit

The foster cats have nicknames, too. Presently we have:

Amos: Buddy Boy, Kissie Boy

Gina: Gina Beans

Riley: Mr. Riley Finn, Mr. Orangey Goodness

Ichabod: Itchy, Itchy Boy

Ganja: Ganja Banja, Beauty Girl

Kiera: Kiera Lovely, Kiera the Beauty

Riddick: Maniac Kitten, Wonder Twin One

Vannay: My Sweet Boy, Wonder Twin Two, my little tabby lover

Fun thread, though I look at the names I call my cats and have serious doubts about my sanity.