Anything that helps disguise the fact it's a Pokeball which prevents my friends from beating me up is cool. :D
I don't know how much I'll use it, though.
Beating you up? Harsh much? I really hope that was a joke. o_O
Other than that, I agree. I'd prefer to disguise it somehow. My closest friends all know that I like Pokémon and they're cool with that. A lot of others I know like it too. But there's always a few who take it too far. I'd rather not have it come up in an argument as an insult or be mocked by everyone including people I don't know. It's not that I'm embarassed, it's just one of those things that would annoy the crap out of me.
If I customized it into a Pokéball, I'd probably pick a Level Ball. They look awesome. I'm not a fan of Great Balls, Ultra Balls or Master Balls. They're overused and I'm not too keen on the designs and colours.