If you don't care about silence, and you don't need performance above a certain point, and you don't like the noctua fan colour....
A) Definitely go for AIO or Air cooling. Custom loop would be a waste for you, since you would not even appreciate 2 of the 3 reasons for doing a custom loop.
B) You don't HAVE to get Noctua fans. There are many options which are just as good and have better colour schemes. Scythe Gentle Typhoons, Corsair Quiet Edition fans, eLoops (not sure of the manufacturer of these ones).
Hope this helps you.