Tom Halsey said:
IMO the perfect Test pitch should seam a bit at the start, then flatten out a bit in the middle, and turn towards the end.
You see, I don't think you can expect one wicket to have everything, as you and a few others have intimated here.
For me, you want proper seaming wickets in England, Zimbabwe and New Zealand, turning pitches in the subcontinent (and West Indies if that's the path they choose) and pitches that offer a bit to the seamers but not as much as in England and New Zealand in South Africa and Australia (and West Indies if that's what they prefer).
Then you have a diversity of conditions which differ wherever you go - that's the beauty of playing cricket around The World.
Personally I don't have the slightest wish to see green seamers in Sri Lanka or turners in England. At the Test grounds, at least - there must, of course, always be some variation around the domestic scene, too - but you can almost gurantee that. You certainly can in England, there are so many grounds.
Wantage Road, Northampton, for instance, is almost a typical subcontinent wicket; there are one or two proper seaming grounds, and there are grounds (The Oval, Taunton to the fore) which produce wickets regularly which help neither seam nor spin.