5: You don't want to wear anything too baggy so you don't get wrapped up in your own T-

, or anything man made (fleece/satin) as these will melt,
I prefer to spin topless as it tends to give more grip and control to my staff while contacting, weaing any think layers makes it a little harder to feel the staff and hence harder to control. Although this is more an issue with living in Britain, not an issue you should have too often in CA.
Either way, good luck with the spinning, just remember to have fun!