I've been a part of so many member-guests over the years (both my own and others). Frankly, the best "experience" is the TM Van. I don't even care for TM gear, but they do it right. I've been to plenty that offer up MyJoys, Nikes, etc and I always hate it because everyone is wearing the same shoes. Bags are nice, but then everyone has the same bag. I love the smathers belt idea, but there are a LOT of people who have no clue what they are or what they cost.
At the end of the day, the best thing I have received is a simple gift card to a major brand or the like. At least then I can pick my own stuff out. You can't make everyone happy, but at least a gift card gives some options.