I want/need/like challenging content. However, this does not mean I like to look at my monitor for 3 hours only to see someone else with a bot or a better connection to the servers get the fight the NM.

Long fights are fine, challenging fights are great. I am also fine with them being really time consuming, as long as it is not stupid time consuming like camping a HNM on a 21 respawn timer and a 3 hour window :P