If Bohemia either a) did not fall to the Habsburg family after the end of the native dynasty or b) successfully defends its independence as a Protestant nation in the White Mountain campaign of 1618-20, the country could have remained a (minor, but not negligible) East European kingdom governed by a powerful oligarchically structured aristocracy, the 'Estates General of Bohemia'. Taking it from there, I would assume the country to stay a minor player in big politics (between Austria, Saxony, Prussia, Sweden, Poland and Russia at the respective times, and possibly the Ottomans as well). Bohemia without a violen counterreformation would probably be vehemently Protestant, enamored of its Hussite tradition, and rather paranoid about Austria. A natural ally for Prussia (provided there is a Prussia) and Sweden (provided there is a Vasa empire). Also, with its own residence and strong cultural ties to central Germanmy (unless the THirty Years' War happens anyway), the country will likely be a full part of the WEstern intellectual and technological civilisation. Add into that a wealth of natural resources, waterpower, and skilled labour and Bohemia could emerge as an industrial powerhouse in the 19th century. But when the world wars start you're on your own...