I have a BD, and I (and all the spectators) love it (it can also be good on kids, but you need to emphasize certain points more than you normally would)!
You wrote about a brainwave deck without counting, but with usage such as ID usage. It sounds good to me so far, but I never had an ID - how do you use it?

Terrible Wizard - Sounds like you're having fun! Keep at it. I always find the BW and ID perfect for edging off nerves and practising on interacting with your audience without having to worry too much about the trick. Sometimes I just walked around town with a BW or ID and see how many people I can approach and perform for.

In regards to the colour of the box, no one will ever mention it. It's just something magicians notice, not lay people, forget it.

Some people feel like they need to give a reason or explanation as to why the card is a different colour back.. Here's a rough script I've used before:

'Imagine you walk into a shop, and there's playing cards on the shelves. There's blue decks and there's red decks, pick one up, remember the colour but don't tell me. Now remove the plastic wrap and throw it away. Look at the cards, in brand new deck order, you can see the Ace of Spades? The Queen of hearts? Choose a card, a completely random card, one that calls out to you. Take it out of the deck and turn it over, put it back in the deck and shuffle the deck real good... blah blah blah

Now when it comes to the reveal, I also ask them to tell me what colour deck they chose, if it's the colour they see at first, then I make a comment about it being easy as it's a 50/50 and continue with the reveal of the card. If it's the colour that will be on the back of their selected card, I don't mention it until after the reveal. I'll say, 'Oh, what colour deck do you choose again?' then tell them to turn the card over. Mind blown.

I prefer BW and almost always get great reactions from it.

Terrible Wizard wrote:

I'm guessing that you're correct.

A local professional magicians who had created a new act told me he took something out of his second show because it seemed to get little reaction in the first show. After the second show, multiple people came up to him who had been to the first show, and came back specifically to see the routine he had removed. They were stunned into silence by it.

Terrible Wizard wrote:

I can also guess the answer to the "added punch."

A reversed card might be explained by sleight-of-hand, or some mechanical method. Having a different color back rules that out. Whit Hayn mentioned this aspect of Brainwave in another topic. I suspect this is the reason Dai Vernon created the Brainwave deck.