WOW....don't really know where to start here.

This thread should be good for discussion though...
Lets start with G-10..first its not a plastic. It is a fiberglass laminate. I used to really not like it at all...but it has become one of my favorite materials!! I especially like the two tone G-10's like black/blue, black/red, black/orange, and black/green. There is also a very large selection of colors including orange, black, blue, red, and green. This variety is only one of the reasons I like G-10 so much.
I am a form follow function kind of guy and maybe that is part of why I like G-10. It is very stable/durable! If bead blasted I find it gets a very grippy texture, but not abusively abbrasive! It can also be polished out nicely if you would rather have that look and don't need the grippiness.
Lets touch on hollow ground blades next. I have and make flat, hollow and convexly ground blades. I will say it up front...I really like hollow ground blades! That said I realize that hollow ground blades are not the best choice for all purposes. I find the hollow ground blade to be at its best on smaller utility knives, defensive knives and hunting knives. What do I like about hollow ground blades....I like the ability to have a nice thin cutting edge. This allows for good cutting and easy resharpening. It also allows for multiple resharpening without affecting the cutting ability.
I agree with you to a point on the thumb stud vs hole in the blade issue. That said Spyderco has pattented the hole...so it has to be a thumb stud for most of us. I think that a well made/designed thumb stud opener can work pretty good though.
Recurves do have a purpose, but I will agree that they can be difficulty to sharpen. They are difficult to make too...

I know this because I have just finished up making my first two...there is a learning curve there
The recurves tends to be a great slicer as pointed out already. Instead of just slipping out of whatever you are cutting it bites deaper!
Thanks for the interesting thread!!
Tom