
The v-neck is definitely a good look if you do it correct. I see way too many people wearing the shallow type and this should be AVOIDED like Sars patients circa 2003. It makes you look like a little boy (see below). I'm sorry if you own one of these but if do whiz it now.
Get yourself a nice deep v-neck, which look cool underneath most jackets or just on their own. Designer ones will put a belting hole in your pocket so best to cop from American Apparel for only £14/$20 and they get top reviews too. Would avoid the bright colours unless that's your thing, white is the best but black, cream and pink shades look good and will go with most outfits. The key to v-necks, as they show more flesh than usual, is to accessorise with a necklace or two and some wrist wear to provide the balance.

P.S. Girls love to wear these as well as they show hours of cleavage. Expect girlfriend to steal from time to time.