Waiting hours on end for a NM to pop isn't a challenge, it's just comes down to luck of the draw... spawn... whatever.
It's not fun, but it doesn't make anything any particularly harder. But you say nothing to take pride in, I giggle because it's post like these that make me feel good about sticking it through instead of going in a raging fit because an MMO, a game, tested my patience. You know, back when I was younger, games did that, so I'm cool with it.