I'll need some help doing this but just want to do some percentage and rarity values for exotic weapons available in game.
You can copy and paste what I have written here and place an O next to ones you own and an X next to unowned, than you can continue with which ones you can't wait to get and have some conversations about them.
I will update the list with percentages once there's enough data.
Bad juju-80%
Dragon's Breath-72%
Gjallarhorn-49%
Hardlight-49%
Hawkmoon-32%
Ice Breaker-96%
Invective-81%
MIDA Multitool-70%
Monte Carlo-34%
No Land Boyond-77%
Patience and Time-80%
Plan C-82%
Pocket Infinity-72%
Red Death-42%
Super Good Advice-76%
Suros Regime-70%
The Fourth Horseman-29%
The Last Word-93%
Thunderlord-44%
Thorn-77%
Truth-76%
Universal Remote-54%
Vex Mythoclast-65%
Update: initial percentages, still have quite a bit to go yet, check back for regular updates.
Rarest gun so far: The Fourth Horseman (PS exclusive)
Rarest non exclusive gun: Red Death
Most common gun: Ice Breaker
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Bad juju 2 Dragon's Breath 2 Gjallarhorn 3 Hardlight 1 Hawkmoon xbox Ice Breaker 2( as drops) Invective 1 MIDA Multitool 1 Monte Carlo xbox No Land Boyond 2 ( as drops) Patience and Time 1 Plan C 2 Pocket Infinity 2 Red Death 0 Super Good Advice 1 Suros Regime 2 The Fourth Horseman xbox The Last Word 2 Thunderlord 1 Thorn 1 Truth 3 Universal Remote 2 Vex Mythoclast 4