Take a look at Kidderminster or Stotfold, add a couple of well constructed jump sections as DC suggests and I think you will be on to a winner.
As DC says keep options open, I think we can have something like 192 layouts at Kidderminster!
For me the worst thing is to get to a tack that is little more than a collection of jumps, there is no flow and I don't find it fun to drive at all. I was a little concerned when I first went to PDA for that exact reason but fair play to the PDA guys the track is really hard but when you get it right it flows far better than you'd imagine from looking at it! PDA is the exception that proves the rule .. can't wait to get back there!
You need to have some flowing sections (although no reason why they can't be over elevation / surface change features like Kiddy) where people can get involved in a bit of racing, over taking. Well that is my opinion any way.
Hope that helps and I look forward to racing on the resulting track when it's built, the more permenant tracks in the UK the better if you ask me
