I like the 'matched pair' look for my knives - Natural handle (wood, bone, horn, antler) = leather sheath, but when it's a man made handle (micarta,G10 ext) it's gotta be Kydex or its cousin Concealex. They have a few advantages over leather being stain proof, waterproof, and a little lighter.
I had a go at making a Kydex sheath a while back and couldn't get the kind of result i was after, but happily I remembered that sometimes the pros have special tools for a reason. After watching a couple of tutorials I rigged up a press and was able to get a much closer fitting finish.
There are two main schools of Kydex sheath the 'pancake' pictured above and the the 'two piece'. I really like the minimalist look of the pancake, and wanted to have a rivet-less design which not many makers seem to go for, but in fairness to them I can now see why, getting a super tight fit between the two sides is pretty tricky.
Hope you're hobbies are as much fun for you this weekend
The Suburban Bushwacker