watches
If you are thinking about watches as gifts, then TAG Heuer, Breitling, Omega and Swiss Army are the brands with the greatest cachet and price tags to match.
Try to match the functionality of the watch with the hobbies of the man who is receiving the gift. For instance, TAG Heuer are traditionally considered action man watches, while Breitling Aviator watches are the choice of flying buffs.
If you are looking for a watch for scuba divers go for one that is waterproof to at least 300m metres. He may not dive that deep, but the watch needs to be very robust.
Watch straps can be leather, metal or plastic as long as the look works. Think about what he wears and find a style of watch to match.
One final point is to think about the size of his wrists. A small watch on a big arm looks as silly as a huge watch face on a weedy arm.