underwears are available in all forms and colours. Briefs was quite famous but doesn't look great. Also boxers (loose boxers and tight boxers) underwear look great - in terms of design and underwear freedom.
Here are few options of choosing your underwear. Its better to try out different options of underwear and enjoy!
Bloomers
Boystyle
Breeches
Briefs
Boxers
Boxer-Briefs
Crotchless
Drawers
Edible
G-Strings
HipHuggers
Lace
Satin
Thongs
Tighty-Whiteys
T-Strings
Underoos
Whitey-Tighties
Y-Fronts
Bikini