If it's any conciliation to you, TC, I raised my Noctowl to lv. 100 in Diamond. Only not out of any sort of love. Those sacrifice Pokemon (aka HM slaves) need to be able to take hits to maximize their use.
I feel like that the Unown Pokemon need a serious boost (maybe tie it into a generation with an 'Unown' legendary?) - more so than any other Pokemon. The first time I encountered one, I was awed. Later, I was awed that such a weak Pokemon existed... and in so many forms.
Noctowl is my favorite Normal/Flying type, it's an owl with psychic powers. Good HP and Sp Def and a pretty good movepool makes it a nice wall.
Unfortunately, people only like the SPAM ALL OF THE ATTACKS OHKO EVERYTHING type of Pokemon, so Noctowl will never get much love over something like Staraptor.
There is also the fact that was stated earlier. Noctowl's stats are not really built such that it can handle the attacks that are bound to be thrown at it. Thunder bolt and ice beam with destroy it. They are both also pretty common although i do not play NU so maybe its less common there.