I managed a few hours on GTA V once I got past the Social Club nonsense. It was a very odd feeling to be playing the franchise again after such a long break - the last time I touched a GTA game was well over a decade ago now!
A bunch of things were clearly much better than they were in GTA IV - the driving and shooting controls in particular seemed like a massive improvement and were much more enjoyable than they were in that last outing.
Overall though I don't think I'll be pumping much more time in to it, the series has just lost something for me over the years. GTA 3 and, to an extent, Vice City just had a certain level of lightness and charm to how they were put together which just seems to have evaporated in the games that came after.
I should have just gone back and played 3 again!