Entering the UTV World

For a long time i’ve been huge into rockcrawling. I have a built old 4runner with a lexus motor in it, most my buddies also have jeeps or toyota built rockcrawlers. But i’m getting more and more into the UTV and RZR scene and I just want to know everything about them! Why people like certain models or why they don’t like some. And all the stuff that is customizable about them and people favorite modifications they’ve made to theirs.