Haha - I had an explore on First about five years ago whilst up for work and visited Cumbernauld before heading to Falkirk. Agreed - both absolutely dreadful places to wait for a bus. In fact, waiting at Cumbernauld, I half expected to look out and see a Kelvin Y type Leopard such was the time warp feel.
Have to say that Scotland has had some of the worst bus stations I have experienced and, unlike the English PTEs, Strathclyde hasn't seemed to be so bothered about providing too many nice places to wait.
Also on the Caledonian bus station roll of shame and thankfully consigned to history, I found Dalkeith absolutely terrible as was the old one in Airdrie. There were a few others that seemed preserved in aspic like Inverness, Perth and Dundee where you'd expect some Smart Thinking/Citylinking Leyland Tiger to appear!