I play games on whatever i have in front of me. Currently my SSK.
It makes no difference to me, just because i'm bad anyway.
But back on topic. I feel like people always want to slim down to the essentials. You want the artisan and things that compliment the artisan or it being on the keyboard.
Not everyone will like a t-shirt design, such as this one with guns and whatnot, but that's part of the character and part of the cap's story. So yea, you may not like it and would rather pay less and opt out of things they dont like, but that defeats the purpose of the story.
Everyone will always have different taste, so like it has been said, some will join and some wont. It's kind of just like any other cap design. Some will like it, some wont.
Overall, reading people's opinion, maybe it would be nice to have an option to opt out of things, but that might take the special element out of the cap's story and just make it just another cap being sold
Small things like keychains are always fun and something everyone likes.
Maybe take a poll on what people would want to be included.
If people really didn't like some of the things included in the package, then speak up and give some feedback.
Like beehatch said, A display, keychain, or even special packaging would be nice. Nice details to the product will always make it feel like it's worth the money.