It's hard to understate how important this is to a Scot, seeing accurate Scottish representation after decades of people who may never even have visited the country playing us. Even X-Men '97, wonderful though it is, continues the grand tradition of presenting a Scots dialect in ways that are nails-on-a-chalkboard for natives to hear, thank you Moira McTaggart. (Banshee's Irish lilt misses the mark too...)
It's why actors like Ewan McGregor, Karen Gillan, Kevin Kidd, James McAvoy and others are doing the lords work keeping their true accents when a part allows them to. Watching Brave I was shocked to hear the 'gobbledygook' speaking character, Young MacGuffin, chattering away in Doric, a dialect spoken in the North East of Scotland (that whole shortbread slice of land between Elgin and Aberdeen). While the entire cinema was laughing at the film's [fairly weak, pantomimish] joke I alone was in on the joke because I understood every word.
I mean, no offence to the work of the late and sorely missed James Doohan as the original Scotty, but his Scottish brogue was, to a native Scot, clearly that of a non-native speaker. As was the very English Simon Pegg's. We mock Pavel Chekov's cartoonish Russian accent way more for pretty much the same crime.
"Baw-heid". It's a wee thing (says yer Ma) but it means so much to a culture that, like many others globally, has been so historically (and still arguably currently) marginalised.