Gin is eventually vodka - a neutral grain or potato based white spirit - flavoured with herbs. As far as spirits go, it's fundamentally different from a bourbon that requires a certain kind of distilling and ageing technique, often restricted to certain places as by legal geographic requirement. That said, gin has history too, originally as a means to use up excess wine grapes via distilling and flavouring with juniper. This began in Flanders and juniper is the most quintessential gin flavouring. Dutch jenever, often sold in ceramic bottles, is a must try for any gin fans. The modern style gin is however English, as its rise to popularity in England in the 18th century. Today English gins like Gordon's are the legacy of that history and probably best answer your question. But there are so many types of  gin now. Japan and Australia, just two examples, are making great gins flavoured with local and indigenous herbs. So who knows what  you may prefer once you try a few.