No, certainly doesn't force the charm. I guess it's just so cool to see him be 'mellow', you know? Especially because, IIRC, he's quite shy and dislikes interviews.

the only show where he got to play golf with kilt and motorbike boots \o/
I've be Callum-ed to get a loopsided smile whenever I see him in that kilt + motorcycle boots combo. *points to icon*