What style of necklace should you make your boyfriend?

Try making one with dark colors, not a lot of contrast, and bigger beads. You want to stay away from light colors, dainty/small beads, and err on the side of conservative in your design. This is if he is a typical male. If not, then you know him best and make something you think he'd like! If he wears necklaces already, that would be a place to start seeing what his style is. Also think about his style of clothing.