Hey, I've made new templates which we can add to the top of all pages of a country. For example the United States, we can add it to the country page, the flags page, but also all the cities, regions, lakes etc. Also I want to add extra options, but don't know really good ones, you may know some?
Hey, I saw you added colors to the infoboxes. In my opinion this looks very strange, maybe reverting it would be the best. Also the rounded borders doesn't match with the wiki, because I just made everything straight and simple.
As for the user tag, I'm not sure if its constructive to this wiki, as you can see, not that many are actually active editing (includes me xD). So most of the time, people'll just see Inactive on their profile.
Welcome sentences? Well, you can go ahead edit them
Chat? Not so sure, you mean the emoticons or the welcoming and leaving messages?
I got not the idea the wiki is really dark, maybe adding more pictures to pages is a good idea to give the wiki more colors. Adding too much differences would be look bad I think. For example if I make the right side bar yellow, it would look very strange. Also the home page is very colorfull and we got yellow/lime links.
And of course the badges you made gives also color to the wiki.