benefits of a melvian:
dragon frenmd!
massive wingblankets
lomg tail
built-in lantern
no sharp points anywhere (except for claws), increasing huggability
reliable ice supply
smaller by dragon standards, approachable to human-sized critters
can withstand extremely cold temperatures
able to receive pets, hugs and snuggles
makes you fonts (sometimes logos)
makes you silly animations and posts
allegedly "cute" (based on multiple reports)
allegedly a "goober" (based on multiple reports)
built-in encyclopedia on type design, graphic design, esoteric computer science concepts, and more
sensitive to injustice; actively tries to make positive contributions to the world

downsides:
not floofy
not weak, but on the weaker side compared to other dragons
limited modes of social interaction
can easily overheat in hotter summer temperatures (100+° F)
sensitive to injustice; can easily be saddened and angered by horrible things