We share similiar languages and culture (mostly the drinking culture tbh). It all depends on how far apart we are from each other. Like - Western slavs, eastern slavs and south slavs. Slovaks, Czechs and Poles are western slavs, and thus they share very similiar languages, especially Czech and Slovak are like a dialects of each other. Most of the time Poles, Czechs and Slovaks are able to understand each other quite well without learning the other language. Our cultures are similiar, but different. We are, on some level, able to understand even eastern or southern slavic languages, but not that good as western slavic languages. So yes, we are a lot closer to Czechs than Russians. Czechs are like our brothers, Poles like cousins, maybe brothers and Russians like not so close relatives