My main ride runs a 48/38/28 triple with a 14-28 six speed freewheel.
After many years (though the years themselves are certainly part of it), I've settled on exactly the same setup on my tourer (which is my main bike). I don't really care if there's some overlap, and I don't do double-shift changes, as I see my setup as three sets of gearing rather than one wider set. I use the middle ring probably 80% of the time, the big ring on longer downhills or if it's flat and I'm feeling fast (which usually means a tailwind), and the little one on steep hills.
Sometimes an even smaller gear might be nice, but as I don't really climb hills much I don't need it often enough to disrupt what otherwise seems just about perfect for me - the 28 front with the bigger four of the 14-28 block is actually pretty nice.
At the top end, 48 to 14 is plenty. I've probably used it less than half a dozen times this year and only ever on long downhills. It's big enough to get me a bit over 30mph, and that's plenty fast enough for me these days - I look back on some of the much faster downhills of my youth and I realize I was lucky to get away with them.
My other road-ish bike is lighter, has skinny wheels, no mudguards or carrying capacity, and I thought I could set it up to be a faster bike now that my tourer takes most of my load. So I tried 52/42 front and 14-24 rear now that it doesn't have to be so versatile.
I quickly found that was way too highly geared for me, and I've reverted to its original 48/36 front. That's still a plenty fast enough setup for me and it's fun - but if I could only choose one it would have to be a bike with a triple.