Two squads left to go and me Dark Angels (DA) are complete - two weeks at my pace

. This is an
actual DA army with only 1 Deathwing squad, 2 Ravenwing, and the rest of the army is green. I've also made sure to keep the DA fondness for plasma and fielded 3 Plasma Cannons (no complaints from me with the 5th ed. template rules)

.
I've porcelain-regular researched the codex, Index, googled and wiki'd the background fluff and still don't know.
Why do the Dark Angels love Plasma so much? - Is it simply because the OOP DA Troop box had a Plasma Cannon?
- Is there some Rogue Trader plasma cannon model that was first associated with the DA?
- Is there a White Dwarf with an obscure line that says "Dark Angels enjoy getting HOT - wink, wink"?
- Did the poet Lionel Johnson write a ode to plasma that began "Plasma, was thou made by a Chinese sweat-shop and born with a wicked need to kill thy user?"?
So far google only reveals that everyone knows the DA love plaz, but not why. The new Codex provides no reason to do it. The Codex Marines have the same access to Plasma. Who wants to show off his/her knowledge of all things 40k?
Thanks,
J
