I used VBScript for about a year before converting all my projects to JScript. VBScript is easier for a lot of things, such as string manipulation and simple built in shell functions such as "msgbox",multidimensional arrays,file iteration, etc.. JScript code is much cleaner thus easier to read and I believe more widely used. So exactly as Alexei says it comes to personal preference. Speaking from my own personal experience I would suggest that if you're new to programming starting with VBScript will make the transition easier but will add more work later down the road if you want to switch to cleaner code such as JScript.
