It's like ShadyW said about keys. If you don't have many (and don't like farming them like a lot of players, myself included), you might want to get the most out of your keys which means fully clearing them. You do get the rift double legendary chance throughout.
But, if you have a lot of keys, why clear when killing the guardian and closing is a far, far quicker way of getting blood shards.
I prefer to do full clears because i don't need trial keys and i usually don't have a million t6 rift keys. Also, i find full clears to be a lot more profitable in terms of legendaries per hour even though i'm usually very lucky with kadala... But one blood thief can pretty much count for like 4 rifts that you close so not exploring the rift can be a waste imo...
You can never predict what might be in the rest of the rift. Nothing saying you have to engage any elite packs/do a full clear if you don't want to but it pays to scope things out before you exit the rift imho. You could be the lucky a** that gets the double stack conduit/power and an all goblin rift (chances are slim, but, hey RNG).
One malevolent tormentor alone can drop 3+ legs, and the occasional blood thief is a nice bonus. its never a bad idea to take an extra 5 minutes and breeze through the rest of the rift.
I have the feeling that i find more legs after the RG then before the RG, Ofcource its nonsence.. but it feels that way. And i like to max out the Exp i get per Keystone, That is why i run the entire rift. Bloodschards arev very nice bur clearing the entire rift take me 5 minutes extra so ill take that.
Even so i have never got a group of Goblins before the guardian so ill keep full clearing those littel buggers.
I do this even for Grifts, In the new season when i get a lvl25 keystone i let a friend with a lvl 1 keystone open so we can do a new grift even when i pay with my lvl 25 stone to keep getting bloodshard and legs without paying keystones.
There are only 3 (objective) reasons to full clear a rift:
1. You have a lack of keystones and want to maximize the Rifttime per Keystone
2. It's a really good density rift
3. You/your group is so fast in clearing a rift that the 30 seconds between 2 rifts would grant you on average 0.4 legendaries (100 bloodshards), if you killed mobs during that time.
There's still the option to close the rift and go back in to continue your killing till time runs out though.
So basicly the only REAL reason to ALWAYS fullclear a rift is a lack of keystones. This means if you already got your perfect ancient RoRG, you can always fullclear. If you don't, you need to run bounties anyway and therefore shouldn't have a lack of keystones.
Ofc there's always personal preference, but I was only talking about the objective point of view.
It is preference and I normally just go with the flow in pubs. I personally would rather full clear since I hate bounties and farming keys but do whatever is placed before me.
The only problem I have is those that think they are being smooth and teleporting in to town and closing, then teleporting back asap to pretend they didnt do it. Lol! If you like the group and want to stick around then do what the group wants. If someone closes and everyone else likes full clears, stealth doesnt work and you will prolly get kicked. But, if I am too worried about doing full clears I will run with my clan. Pubs are hit and miss.
always close after rg. like someone said above, the only reasons to fc are shortage of keystones and too efficient to the point that 30 seconds downtime ruins your exp/hr or legs/hr.
no there doesnt have to be a vote. if you want to fc then go to the communities and set up a fc group.
shards are better than random mobs.
and no to the person who said the thing about more legs if you fc. legs per unit time is the same (or more because of kadala) from closing. legs per RIFT is obviously more if you full clear, but that is a piss poor measurement.