I'll agree that Apple's mice are a little uncomfortable to use, but the touch features on the Magic Mouse are worth it for me - being able to use expose or switch between desktops with a gesture is very valuable.
I'm only an occasional gamer, but it was enough for me to jettison both magic and mighty mouses after a few days. Shame.
I just keep the base of the hand outside the lower part of the trackpad
There's also a trackpad<>keyboard hand movement as well so it doesn't stay there always.
As far as I can tell, most everyone I know has converged on the Logitech Performance MX as the undisputed (though unfortunately expensive) most ergonomic and functional mouse.
Personally, my best experiences have been with Logitech mice. The Performance Mouse MX and Marathon Mouse M705 are both great.
I don't disagree that they're terrible, but didn't they end production of those 15 years ago?
Mighty mouse scroll wheel was amazing and I still lust for it, but today I just use magic trackpad - it's flexibility with gestures and low profile helps with fatigue. However I find repetetive and quick tasks to be done easier with a traditional, ugly and cheap wired mouse.
Total piece of crap.
Have a 12 year old Microsoft optical USB one that replaced it.
You're not supposed to grip the magic mouse. Hold it with your thumb and ring finger on either side of the apple logo at the bottom, palm wresting on the mouse pad, and use your index and ring fingers for clicking and scrolling.
When you click, your fingers should be in the dead centre of the mouse.
Or just get a magic trackpad.
It's not because I don't know how to use the three sea shells.
Apple is one if the only vendors that actually doesn't actually consider biology when designing a product. Even the shittiest Lenovo or no brand Chinese clone laptops are made of better materials.
So I use my Lenovo instead and the MBP sits there like a lemon waiting until I can be arsed to clean it out and eBay it.
LOTS of people have this problem. My dermatologist said that he sees 3-5 people a week that have contact allergies on hands and ears that use apple products. I tried to email apple about it - never heard a thing back.
Edit: 2 days of using an MBP without vinyl around it: http://i.imgur.com/HgDquuE.jpg
Evoluent probably will have to come down in price now that there are more competing alternatives. Vertical mice solved my wrist and my coworkers' wrists' problems.