Interestingly I agree with lots on here.
Glebe barn lol, great place I agree.
If you are into trekking then I would recommend the West Highland Way. Circa 100 miles + a few more each night to go down a local pub for a pint and something to warm you up.
Other than that I would recommend anything up the west coast of Scotland (and I stay on the east!!).
various islands - Skye, Eigg
Edinburgh is beautiful
Really depends on time of year.
Don't forget Edinburgh festival is very busy and expensive in Aug - early Sept.