Agreed. I must've completed the VoG about 50 times, and they were all fun. I did Crota about as many times, but that was mainly as I was trying to get Black Hammer. I finished Oryx twice, and have never bothered with it since.
Edit: I did enjoy Crota solo though, that was a real challenge as a level 32, especially as they got rid of the various cheeses over time.
Never completed oryx (hard), i was falling asleep by the end, every stage was stand here and use black spindle (black hammer) or touch of malice on end boss.
VOG allowed you to play your own way, i loved using shotguns and fusion rifles to complete it, end boss did require a few weapons but was more then just one.