This is the first game that I've had a love/hate relationship with. There are so many things that piss me off about this game, but I can't stop playing it. My main focus was actually in the Crucible, and I started getting jealous when everyone else had all of these crazier guns than me. Then, I started focusing more on the campaign events to try to unlock all of these weapon and armor perks so I could finally make the Crucible matches feel more like a fair fight.
What pisses me off is that there should at least be some sort of "tournament" or arcade mode that gives everyone access to the same weapons and perks up front so we can just focus on playing for fun without feeling like we are at a disadvantage. That's what I loved about Halo. Imagine if you had to grind for 50 hours just to have a Battle Rifle in Halo 2. Destiny has awesome gameplay, but the "rpg" element basically wipes a big booger on it.
The "bounties" are probably the most annoying thing, it's basically no different than pulling up an Achievement or Trophy list to do annoying tasks like "shoot X 200 times in the head with weapon Y" to earn 20 gamerscore. I hated achievements that made me do that, and Bungie thought it would be a great idea to make that a never-ending game mechanic. I finally did unlock enough good weapons and armor with useful perks, but it sucks how much I had to "work" to get back to what I originally wanted to do... enjoy the Crucible mode.