The Kettering-Cambridge Line-Ivatt 2MT 2-6-0 heaven, with the odd J15 thrown in for a good measure. This will be my long term project. Just need Bachmann to produce a Standard Class 2MT 2-6-0 78000 eventually.
Originating from Northamptonshire ironstone railways are also of interest and this a demonstrated in my micro-layout Juniper Hill.
Having lived in Devon for a number of years and falling foul of the beauty of the Tamar Valley I'm interested in the Southern Railway line to Okehampton and the Callington Branch. This will no doubt provide the basis for a layout one day.
The railways of the Scottish Highlands and Borders will also produce suitable layout ideas as well
I also love narrow gauge railways and a 009 project is underway for 2019.