Just my two-penneth after my first half marathon. I throughly enjoyed the morning, partly because I was faster than I expected, and partly because it was sunny. 
A couple of specifics:
- cost: perfectly reasonable
- goody bags: no loss to me - if I get a decent t-shirt, a medal and a banana I'm perfectly happy. I would rather not have a plastic bag full of flyers.
- start: I started further back than I would have liked and finished quicker than I expected, but that's fine. All part of the learning curve. Plus it sounds like next year's move will help.
- Personally I like a scenic route, but I thought that Sunday's race had nothing to apologise for in that respect - I thoroughly enjoyed taking in the views in the parks (particularly the fountains) and along the waterfront (despite the slight headwind). Some major cities - eg Manchester - don't have a half marathon event at all.