Hi, For me the most pleasure in fishing IS getting down on the river, where ever that maybe.
Never fished a commercial water in my life (48), had a go with the matchfishing when I was younger in the late 70s & 80s, which was always fun, met some nice guys, but the appeal of say "a fish a chuck" on some overstocked commercial never did seem like it would be a pleasure to me, (I'd rather have a blank on a river anyday), I've always avoided commercials, will do my best to carry-on doing the same.
As far as stillwater v rivers goes, I can actually have a good day on a river and catch little or nothing & enjoy it, but not the same on stillwaters, I just love fishing rivers even if I'm only catching 2-4oz roach, I've also had some good days on lakes (not commercial) & canals too, but the appeal of rivers will always be No 1 for me. The thrill of catching a fish in a longtime fishless/poluted stretch of river is something I never forget, seeing the same improve over the years is nice too, Calder in W, Yorks, lower stretches being one close to home.
cya