I'm planning a trip and looking for recommendations

[neloon]

Of course I would say come to the Northeast and go on the castle trail
https://www.visitscotland.com/see-do...-castle-trail/

Alan

[Regimental]

Given you are planning to get around primarily by bus and train (and have already spent time in the highlands), I would suggest using Edinburgh as your base, and travelling to Fife and up the east coast, as well as doing some areas in the Borders.

Edinburgh and its immediate surrounds can easily occupy a week – give it 3 or 4 days at a minimum if you can. All very accessible by bus/train (and within the city itself, often easiest done on foot).

Glasgow people always like to claim that Glasgow is the place to visit, but much as I like the city and go there fairly regularly, it’s not a particularly tourist-friendly place (and any visitors I know who have taken advice to base themselves there rather than Edinburgh have hugely regretted it) – a day visit is very easy to do from Edinburgh.

I would normally absolutely recommend visiting Galloway – and in particularly the coastal areas, which are stunning, and still relatively undiscovered compared to much of the Highlands. But they are really only viable if you are willing / able to hire a car, unfortunately, as they are not at all well served by bus or train.