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I like to think of different web communities like these as different 'countries' with different cultures. Once you get over the initial phase of tailoring the websites to your liking, learning the etiquette, and just getting to know the place you become much more 'at home'. Sure, it's intimidating, but it would be to visit Poland as well. However, you don't get the niche communities that Reddit has on here. :/ It's just the way that Reddit was set up with the subs really facilitated a lot of small groups coming together.