You will never see a 100+ ball run made up of all easy shots. You might not see the cue ball fly around the table, like you do in 9-10 ball, but difficult shots need to be made.
While great pattern play can make up for weaknesses in shot making ability, it also works the other way around. The top shot makers of the game won't always play perfect patterns because they just don't have to. Also, their skill level is so far advanced that they may feel comfortable with different things than others are.
The "correct" pattern can be different, depending on the level of the player executing it.
Whenever I watched Mosconi I would swear running a hundred balls was the easiest thing in the world. He never had a tough shot. After watching him I'd run to a table *knowing* I could do it too -- he just made it look that simple.
Lou Figueroa