A little insulting.
While I'm overjoyed to see a film about a great Scot (insert witty comment about Back to the Future here), I can't help but be a little insulted by the casting.
While Johnny Lee Miller is a great actor, he's English. There are plenty of good Scottish actors who could have played the role of Obree.
By no means do I hate the English, but I find it hard to take when a local hero is played by what is essentially a foreigner.
*Update*
I haven't actually seen this yet, though I plan to and I'll probably enjoy it! Not letting my slight bias get in the way.