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(X) Dragon's Breath(X) Gjallarhorn(X) Hardlight(X) Hawkmoon(X) Ice Breaker (X) Invective(X) MIDA Multitool(X) Monte Carlo(X) No Land Beyond(X) Patience and Time(X) Plan C(X) Pocket Infinity(O) Red Death(X) Super Good Advice(O) Suros Regime(X) The Fourth Horseman(X) The Last Word(X) Thunderlord(O) Thorn(X) Truth(X) Universal Remote(O) Vex Mythoclast(X)