Help me pick ski Size

If they make a 191, get the 191. If not get the 186 for sure.

Its all personal preference. In my opinion, 181 is not too short.

I am also about 6'2 and I bought a set of 182 Armada Alpha x's (not really sure if they are comparable to ON3P's, but similar waist width) as a sort of fun all mountain/park ski. While they were nice and light/easy to spin in the 182 length, whenever I was not doing tricks, or i was out of the park, I always found myself wanting a much longer ski. A longer ski will likely provide a lot more stability at speed, and more control in variable terrain, and if you like going fast then it will really benefit your all mountain skiing. If you are willing to put up with a little bit more swing weight, then you will find a longer ski will be more versatile out of the park and you won't have to compromise all mountain performance for the sake of lower swing weight. This is just from my experience, hope this helps! :)

Looks like ON3P only makes the Kartel 98 in a 186.

I would say that you should get either the Kartel 98 in a 186 or even the Kartel 108 in a 191. The Kartel 108 would be a great all mountain ski and still handle park very well.

Thats just my opinion.

For daily drive = 186cm.

You could rock 181cm in the park but would over-drive the 181cm skiing fast all-mountain at 6'3".

I'm 6'3 185 and ride the 186cm kartel 98. I wouldn't get any shorter, I think they could be like 188cm and it would be perfect size for park and all mountain

186 for sure. I am 6' tall and have 181 Kartel 108's as my daily driver. So the 186's would fit you at 6'3" just about the same.