I've only played Big Sky once, but I recall thinking that if you took the mountains away, you might end of with a central FLA course. The sight is as flat as a table, with all these man-made ponds and a little stream that cuts across one of the par-5s early in the round like a dozen times (okay, maybe not that much, but you get the point). In Ontario I've played his work at Deerhurst Highlands (aesthetically bland, but a pretty good course nonetheless), Mad River (eccentric, interesting in spots, less so in others) and Beacon Hall (generally thought to be in the Top 10 in the country, though I think that is 15 spots too high.)
He's big on strategy, but his aesthetics are less than appealing.