I think Munge brings up an interesting point. Adventure/Ethics vs Aesthetics and a good line. First of all what is a good aesthetic line? I sometimes look at a line and think " I like that " when I know very few will echo my sentiment. This is an internal argument that I have had many times when putting up routes. What is good, what is aesthetic?
For me a line can be total choss and still be a good and aesthetic line. An example, Feeding Frenzy, I have done it more than once and it just has a look. Another route is Gutter dang I like that route, but it is awkward and a battle with rat poop.
Premeditated is a route that just draws me in but there is nothing solid about it. I have been to the top of the second pitch which seems to be as high as it goes. So, why go back? I dunno, I guess because it has a certain aesthetic about it that just looks good.
Nexus is definitely a classic yet the top is not solid and most likely never will be. Bachar Yerian has a reputation of spitting people off because of knobs breaking. Yet looking at those routes makes a person want to climb.
With all that said there those routes that years later make me wonder. The old stuff on Casino Rock, why did he pick the line that he did? I will never know. But that is also part of the allure. Why do obscure routes? Either as first ascents or to just to have done them.
For the adventure, the numbers, to pass the time away, to get away from people, to fill up guide books? In just about every place that I have climbed there have been routes where I have thought, "why did they put that up".
What I have noticed over the years is the route that I wonder about sticks in my memory as well as the perfect route. I will not trade one for the other.