I chose no improvement. I've been kegging for about a year, and my beer is much better now. However I attribute that to process and experience, not kegging.
One thing I will say is that I don't know if I would be brewing as much if I was still bottling. I never enjoyed bottling. IT took me too long, and was just a PITA. Bottling was a good chunk of an evening after work. Kegging is something to do among other things while the mash is going,o during commercial breaks. IT's quick and easy.
I made the switch to kegging and all grain about the same time. That was because I felt if my brew day was going to be taking that much longer, I wanted to shave time of in another area. That and I have always wanted a kegarator.
Like dontman said, there issomething wonderful about pulling a pint in your own house. The two most glorious moments in homebrewing for me was when I poured my first bottle of beer , and realized that I CAN make my own beer. Second was pulling the first pint from my kegarator