I have two 18" WWII's, a Bura and a Sher. To me, they are a bit awkward, a tad heavy, a little long. But for heavy chopping, they are fine. I'm just smaller than average, so they're a bit big all around.
I also had a Bura and a Sher in 16.5". The Bura sings to me. It's my go to khukuri. The one I grab when the job is unknown or things go bump in the night. The Sher is just a shade heavier, but I know it's a Sher and not a Bura when I pick it up.
You notice I said had? I still have the Sher. But I picked up 2 cracked handle blems, both Bura's, so I now have THREE 16.5" Bura's. One to use, one by my bed, and one for a spare. Plus the Sher. And the two 18"ers.
As they say in pistol competition, one gun to shoot, one gun for a spare, and one gun in the shop ( getting worked on ). I do that with my CCW CZ83 380's. I have three of them, all with a 13+1 capacity mag in them, and two spare 10 round magazines.