Extroverted and Introverted Countries
One of the best parts of traveling is to learn about new cultures. One of the first things I tend to notice when I'm adventuring is whether a country is extroverted or introverted in their interactions, which lets me know how I'll fit in. I am introvert and proud of it. I like my alone time, and take pride in my smaller group of friends. I can act extroverted if I need to, but at the end of the day, I like to retreat home and recharge my energy. I fully believe people are born either extroverts or introverts and aren't truly about to change that about themselves. But some countries have a larger population of one over the other, and that's when it gets interesting while traveling.
Note: I'm not trying to stereotype any countries here! I'm just basing off of my own perceptions of outgoing vs. shy places in the world. I don't cover African or Middle Eastern countries, because I do not have enough knowledge on these locations to know their quirks.
The United Kingdom is very well known for being a country of introverts. People like to mind their own business and don't want to be bothered. They are appalled if a store clerk greets them upon their entrance and won't even learn the name of a neighbor even if they've spoken to them for years. These are definitely my kind of people.
Germany, Scandinavia, Eastern Europe
All of these countries seem to err on the side of being more quiet and private in daily life. In fact, they're know as some of the most introverted countries in the world. Speaking to people in the street is heavily avoided and eye contact can be seen as being overly nosy. These countries are an introvert's paradise.
This country could be seen as an ambivert. There's the feeling that everyone is secretly outgoing, but not willing to show you their true ways until you get to know them better. The stereotype of the French hating Americans has never affected me, but then again, I try to not act like an ignorant tourist when I'm traveling, which could affect how they've treated me, which has always been wonderfully.
Spain, Italy, Greece
If you're going to Europe to feel welcomed immediately, the southern countries tend to be a lot more ready to see you in the street and invite you over to their house for a big family dinner. They don't know you, but you're already a part of their kin. People talk to you on the streets and actually want to get to know you. These are very friendly countries.
Latin & South America
I haven't been to this part of the world, but if I've learned anything from "An Idiot Abroad," it's that Rio in Brazil is the perfect place for a deaf person to live because of how loud it is. With many people ready to say hello and happy to see you, it makes sense that these cultures are heavily extroverted.
South Korea, China, Japan
In a lot of Asian cultures, shyness is actually the preferred quality. From the three exchange students I've lived with in my life, I've noticed that it's just the norm to be quiet, demure and only really speak when spoken to, especially when with people they aren't close with. I would think it might be a little hard to make friends here, especially if you're a foreigner.
For how loud us Americans seem to get stereotyped as, we and our cousin to the north feel more like an ambivert society as well. We can be really loud and like to meet people, but are not likely to invite you home at all. Our stuff is ours and we'll say hi, but stay away from our private lives and our feelings.
Australia, New Zealand
Everyone wants to be your friend in Australia. Every Australian I've met is outgoing, happy all the time, and wants to get to know you. New Zealand is the quieter sister who stands next to Australia while it does all the talking. I think I'd be better of in New Zealand with my shyer personality.