Here is a short rundown of the CURRENTLY FINISHED dragon nest requirements... there may be some variation within nests, due to dragon preferences.
Bubbles and Psilocybe
https://toyhou.se/9569532.bubbles-and-psilocybe" onclick="window.open(this.href);return false; - 13 available - Bond not required, but preferred. They will not be very large, between 6 and 7ish feet tall either at the shoulder or at the hip, quad or bipedal; They have a very clear 'drinks and debauchery' theme; might be good to have a bar, nightclub, rave, or venue, alternately might enjoy a distillery or winery. Currently no reserved dragons, though some lend themselves to being paired together.
VEGAS, BABY! and Sareuz
https://toyhou.se/9570322.vegas-baby-and-sareuz" onclick="window.open(this.href);return false; - 15 hatchlings, 13 available, 6 sets of twins - Bond not required but strongly preferred, can bond to other dragons or each other out of the shell. (sorry that Vath and D'frenz didn't get made, though) Half-Drak, thus some may be bipedal, medium sized around 8' at shoulder/hip. These are *not necessarily polite or safe for work* dragons, but aren't markedly explicit in terms of visuals. Their names on the other hand are rather offensive

Many are twins - in fact almost all of them are, though they don't have to go together. They are racy, colorful, even gaudy. Currently TWO of these are reserved for Trix's dance group, however one will be hatching among others
Rathegengeth and Sonyth
https://toyhou.se/9570136.rathegengeth-and-sonyth" onclick="window.open(this.href);return false; - 15 hatchlings, 12 available, all twins - Bonding not needed though they do carry strong genes for it (sonyth spending that much time alone in the Healing Den and the grandparent of these just outright NOT wanting bonds). They can absolutely handle a modern, everyday, sci fi, or post-apoc setting, as they're effectively human-sized (from 5'6 to less than 6 feet tall) bipedal dragons. But do be prepared because they will definitely be spouting taunts in chat. 3 reserves for Death Court.
Banityna and Livoyee
https://toyhou.se/9569324.banityna-and-livoyee" onclick="window.open(this.href);return false; - 12 hatchlings, 11 available, 3 'must pair together' - Bond not required, however preferred; can bond each other. Gender studies and extremes, and more than a little stereotyping in the best ways. Half Drak, so some are bipedal, they are from 7'6-8'6 at the shoulder or hip depending on configuration. I see these as being very 'college campus' friendly, with a touch of cringe here and there.
Yanna and Berzra Houtalli
https://toyhou.se/9593600.yanna-and-berza" onclick="window.open(this.href);return false; - 11 hatchlings, 10 available, at least one pair that probably should stay together. These do not need bonds, but should probably hang with groups, other dragons, or specific locations. They may be size shifters however they are on the large size and may be anywhere from 7' at the shoulder to ... like, nearly 30'... Will absolutely cause cat dander allergies in people. One reserved for Trix.
*** Currently not done but some in progress ***
Inaras Thain and Discodanth
https://toyhou.se/9569853.inaras-and-discodanth" onclick="window.open(this.href);return false; - 11 hatchlings (1 finished currently) Though they can bond, they don't necessarily care to. Be prepared for bling, big dance moves, and dangerous pointy bits or acidic spit. They will be medium to large in size, 9 to 12 feet at shoulder averages. Should definitely have a musical or performance based theme for either candidates or locations to support them.
Gozu'lath and Goth
https://toyhou.se/9569682.gozulath-and-goth" onclick="window.open(this.href);return false; - Possibly up to 9 or 10 hatchlings, none finished/started yet. Though these are definitely Alskyran / Pernese they do not *require* a bond, nor would some of them desire one. They are not large, from 5 to 9 feet at the shoulder at most, generally they'll be around 7-8. Some of them are internet-memey, while others are just overall writing-type puns. They will require coffee and possibly a laptop.
Marshmallow and Slobber
https://toyhou.se/9569963.marshmallow-and-slobber" onclick="window.open(this.href);return false; - around 7 or 8 hatchlings, two possibly in progress, none finished yet. Food based memes, big broad or tall and cartoonish bodies, and may be partially bipedal, centering around 6 feet at the shoulder or hip. Mallow is an Equestrian (mlpfim) dragon, while Slobber is a Night Fury, so... there you go. Expect chefs, hungry hippos, restaurants, or ranches to house these guys.
Yanna/Terminys/Viagrath splice
https://toyhou.se/9570929.viagrath-yanna-and-terminys" onclick="window.open(this.href);return false; - there will be a lot of these, probably cat-like and fluffy/allergen producers, in addition to being incredibly snarky. As these are more internet ageisms and memes, it could be anything. Many twins expected. Can be quite large, they are part Drak so they might sport unusual wings, or bipedal as Viagrath is...