There is one other thing about kegging and serving beer on draft. It is colder than serving bottled beer. You can set the thermostat a bit lower for the kegs, and if it is a dedicated kegerator, the only time that you open the door is to service or change the lines of kegs. 99 out of 100 times I'd say that draft beer is colder.
I know that you don't always want beer to be the coldest you can get it, but even with an English style beer, it is nice to pour it cold and let it warm up gradually in your hand while you're enjoying it.
I love kegging for a multitude of reasons (I, too, bottled for 15+ years), but the coldness, freshness, and shelf life of draft beer can't be beat. If you do it well, that is.