Honestly speaking, Tallinn is a boring place. Might be good for business but I don't see it as attractive for people willing to move, maybe in the short-term for a job but it's not a place I'd see many settling in.
Go visit it anyway, that's, of course, just my impression, but even living in Stockholm (a place I consider a bit boring for my standards of big city life) I found Tallinn very very dull.
Having lived several years in London, and experienced plenty more cities including NYC and San Francisco I’m more than ready for boring. Indeed, this is why my current home town is Stockholm because I kind of agree with you – it’s a little bit boring and very safe, and I love it!
Go visit it anyway, that's, of course, just my impression, but even living in Stockholm (a place I consider a bit boring for my standards of big city life) I found Tallinn very very dull.