I love Irish stuff and have a fair bit of it, but I run a bit of everything, won't be any particular era which I know isn't everyones cup of tea.
I put the green colour on the wall as a nod to the old CIE livery.
I am a confirmed DC only man, will probably be 4 lines (1st to 4th radius), passing loops, long sidings, lots of full length trains like the old layout, lots of operational potential.
Very old fashioned in the approach I know, but that's just me!!