I am living on a retiree budget.  So, I allow myself one loco per year.  Almost always choose WBB.  I don't need a loco with every bell and whistle for $1500.  I do feel that midwestern and Canadian roadnames are a little less represented.  I would love more Grand Trunk and Canadian National equipment.  Very little Detroit and Macinaw available.  I love the green, black and yellow colors from GTW and CN, but these are hard to find.  Anything with Michigan Central or Pere Marquette would get my attention.  I still get excited like a little kid when I open my Williams box with loco enclosed.  Love to pick out a passenger or freight consist that is appropriate.  Keep 'em coming!

Regarding the engine sounds getting to be irritating:  I had a set from the 70s with the Mighty Sound of Steam.  I could only take about 5 minutes of that.  The wires from the tender to the loco worked loose, and I never put them back together.