Have you ever noticed how watered-down, North Americans, black, white, Asian, or whatever, look (execpt, of course, PURE natives)? On the other hand, Old-worlders have extreme features. I remember when I went to London, I felt like I was in a cartoon (no offense to the Britons on this board. I don’t mean that as an insult, I like cartoons)! Huge, character-filled noses, dramatic builds and facial structure, and I’ve never seen so many examples of story-book rosy-cheekedness in my life. Now everytime I look in the mirror, my face looks so simple and bland. I know it’s from all of the mixed nationalities, but then why are we so tall, as a country?
Hey, I got yer dramatic build right here…
Seriously, I think you can easily find a wide array of extreme features in a country with ~250 million citizens, you know? We hardly look all alike.
I am proud of my bland, generalized features that let me blend in a wide variety of locals, from a good part of Europe and South America, South Africa, and western Asia, with ancestors from a half-dozen European countries and some that walked here from Siberia.
As to why we are so tall as a country- maybe its the fact that your typical American eats more throughout their life(this being most important during childhood.)
I don’t think we are that much taller than the average European. If we were, it would be diet.
And, second, I have no idea what you are talking about. The people in Europe looked largely like most other people I’ve met from Europe and the US. Perhaps you are just not used to their regional features and you think you look bland because you are used to yours. Perhaps you were the exotic looking one to some European complaining of bland features surrounding him in his native country.
I thought the guys in Spain were particularly hot, but I didn’t notice any specific extreme features I wouldn’t expect to see in Montreal.
This American looks like any other bland Northern European, being that is her heritage.
I know my OP is stupid sounding, but I’m certain I’m not the only one who can tell an Old-Worlder from a New-Worlder upon first glance. And I didn’t really mean to use such a perjorative word as “bland”. I just meant, simple and conservative, nothing drastic.
I think I know what you mean, pizzabrat, but hell if I know how to word it better myself.
Isn’t it a sign of bigotry to say “They all look alike”? 
I don’t know about the rest of you, but the women in my family would blend in very well in Scandinavia. Mom’s the second generation of Icelanders born in Canada, and I’m of the first generation that isn’t pure Iceland in many generations. Total strangers have remarked on this similarity to other Icelanders. (Total strangers who know what Icelanders look like, of course.)
I’ve noticed West Germans tend to have rounder, fuller faces, and their cheeks tend to be redder. I don’t see any diference between most white people in the US and Britons.
Are you sure what you are reffering to is not just set off by the ‘character’ that the person is portraying themselves as? I’m not noticing a whole lot of homogenous-ness, but I do notice that when a person stands out, as a storybook character, it’s their dress or affectation.
On the other hand, it may just be my location, there’s a whole lot of diversity over here. When I visited my parents after they moved to Asheville, NC, it was a little spooky for me. We went to the Thankgiving Day Parade and all the kids from the white schools looked the same, right down to the same hair dye; all the kids from the black schools, were the same down to the style of braids they wore. There was no mixing of the groups and there were no other types of groups around. I never realized how much I liked NY, until I saw that.
MEAT!
I, a person of not entirely European genes, can “pass” in a dozen countries and Canada. 
I’ve heard, “Oh, I’m so sorry - I didn’t realize you were American!!! blush blush blush stammer stammer” many times.
American men are taller and have broader shoulders than men in several European countries. This is of course, a generalization, based on a lot of travel in England, Ireland, France, Germany, Spain, and Italy. European men seem shorter and have narrower shoulders than your standard American lumberjack. The Dutch are an exception.
My ancestry is Italian, Spanish, German, Swedish and French.
Approximately 80% of the people who have ever met me have asked me if I am Asian.
As for the OP, maybe the word you’re looking for is “homogenized”? A great many North Americans, I would bet, are the product of ethnically mixed backgrounds.