Well, for my part I'd have different reasons for different parts of this, GIVEN that it will  
be free-form possible in the future.
So, let me split this into two parts:
1. I don't really have anything against humans, of course, I am one after all and I see  
myself as a human in RL. And regarding "needs" I think our bodies provide us with quite  
anything we need to survive. BUT that's exactly it!
Our body provides us with all features to survive in the world we live today because we  
shaped our "world" to our needs. But comparing us to other lifeforms there are many parts of  
the human body which are underdeveloped, maybe "effeminated" to use another word. Of course  
I don't NEED fangs and claws, for example, in this world, this society. Of course I don't  
need to lift 10 times of my own weight and such like some animals can. But compared to many  
animals I sometimes do ask myself why we have come to be this way.
So, yeah, if genetic engineering would someday give me the possibility of stronger muscles  
and bones, if it would allow me to have the teeth and muscles to rip "prey" like so many  
wild animals do, give me the speed to chase whatever thing without using a car, sure, come  
on, give it to me. No, I might not NEED it right here, but it would undoubtedly increase all  
chances for survival if anything like that would become necessary once again and maybe then  
it might not be totally exaggerated to call us the "most developed species".
Regarding ALL THIS text now: Please don't engage into discussions like "But that would only  
cause more people to solute their problems with fighting, hunting and killing each other" or  
anything related to that, I do realize the possibly bad parts of this, too, but it would  
totally lead this discussion to a different topic, and I don’t really want that. So, yeah,  
that's my opinion on that. (Oh, and by the way, yeah, I am in general interested in  
transhumanism science^^)
2. Now about the "furry" aspect. So, yeah, I am FOR the genetical improvement of humans SOME  
DAY, when it is actually safe enough in many ways. So, making these changes to the human  
body will surely influence the look, of course bigger muscles, bigger and stronger teeth  
would make us look different, more "primal", animal-like, but this would, that's what I  
think, not lead us to becoming our fursonas or something like that. THAT would be another  
point once again, so, maybe "cosmetic" genetic engineering. I don't want to discuss about  
this "Brave new world", "people being 'ordered' and specifically bred-topic now, that's far  
too serious right now.
So, keeping these "problems" aside, yeah, for the sake of coolness, I'd do it, I mean,  
nothing against the human body, but damn, my fursona just looks so much cooler than me.^^
So yeah, considering all this I'd do both steps, but of course I do realize that there will,  
or would, be problems with this. From general health, to political, social/moral stuff and  
so on and so on, all this topics I didn't want to mention up to now. So, this is written  
from an "utopian" viewpoint, so to say, and I don't seriously believe everything will be so  
easy and "dandy", but if it would be, for the sake of genetic improvement as well as  
coolness, yeah, this topic really is interesting to me.
Oh and about "the future", yeah, I think genetical engeneering will be a big part some day in the future, but until people change their look completly to "fursonas" just for "coolness", I think that is even further ahead and will take even much more time.
Thanks for reading, and please don't rip me apart for maybe not thinking every single point  
through and through.
Greetings,
RealZero