Wow, Paizly has so many darn toys. Between her and Zoee our house looks like a day care, LOL.
But I'd have to say her favorite is a ball on a stretchy string with a long feather (boa type) hanging from it. I have it placed in her room so it dangles all the time and at night (or the wee hours of the morning) I can hear her jumping around playing with it. And if it gets stuck up so she can't reach it she'll sit there and meow at it so we will get it down for her.
Also, another favorite of hers is simply the bedspread. With or without a foot or hand under it to make it move. She will pounce, do flips and rabbit kicks all by herself sometimes.

Taz doesn't really play much anymore. Sometimes I can get him engaged in the moving bedspread, but not too often. He is more into the sudden bursts of energy and tearing down the hall sounding like a heard of elephants.