ultimately its about whether the particular suit the face shape
of your bf, and the maintenance. My friend spent 35 min in front of
the mirror with 3 combs, 1 clay, 1 spray, some water, and a
hairdryer to do up his hair every morning....
Anyway, most reputable stylist have a book or something that show
different hairstyles. Or you can ask the stylist to design/makeover
for ur bf.