I think some wheels are definitely better and more worth the costs than others.

Wheel of Excitement: Not a bad wheel, 150 nps to play, chance of winning 10,000 nps, level ups, items, I usually get the ? but oh well.

Wheel of Misfortune: Not worth it in any way in my opinion. Too many bad "prizes" and risks.

Wheel of Mediocrity: Not horrible, 50 nps to play but prizes aren't all that great.

Wheel of Monotony: Besides the long wait and the play once every 24 hrs I like this wheel. For 100 nps you can win 5,000 nps when you land on the single bag of nps. Imagine if you land on the multiple bags of nps. Also, there is the chance of winning a Tyrannian Paint Brush or Tyrannian Petpet Paint Brush.

Wheel of Knowledge: Least favorite wheel of all. 500 nps to play and I usually get a free spin and a berry on the next spin. I dont think its worth the price. Maybe once I have some luck with it I'll like it a little more.

Fruit Machine: Says "Spin the Wheel" so I guess its a wheel. I like this wheel a lot. I won a 15,000 nps, a Blue Paint Brush, and an Evil Muffin. Sold the Paint Brush for 40,000 nps and the muffin for 350. That's a 55,350 nps profit from that one free spin. Definitely worth a 2 second click each day.