Hi there. Edinburgh is a wonderful place to live and work. I've lived in a few different places, including the US, and there's nowhere quite like it. Edinburgh is one of the world's most beautiful cities and regularly comes top for quality of life in UK. It is compact, with great public transport, and you are probably never more than a 15-20 minutes drive from the surrounding countryside, with hills and beaches on your doorstep, and only a few hours drive from the most stunning scenery in Scotland. The city is a cultural powerhouse, hosting the world's largest and most influential arts festival, and a great place to be a writer - named UNESCO's first City of Literature, in recognition of its thriving literary and publishing scene. Retail is one area where Edinburgh perhaps doesn't fair so well, at least compared to Glasgow, which is second only to London as a retail centre, though Glasgow and Edinburgh are only fifty miles apart and plenty of folk commute between the two. This site might be helpful.
I think at least one of our regular contributors on the forum, ken2000ac, is originally from the States and has lived here for a wee while (check out Kenny's amazing Flickr account to see how stunning Edinburgh can look), so he might be well placed to give you some good insight, and I'm sure some of the rest of us would be happy to answer any specific questions.