I know of only two types of person native to my original world, those being humans and cherubs, although I believe there are additional types of person in distant parts of the universe which were never explored by humans. Humans have all the features attributed to humans by Riley above, except that we have only four fingers per hand including the thumb. The human species exists to produce, distribute, and play Sburb.
Cherubs are scaly, winged, green humanoids. They are hermaphroditic; that is, each individual has both male and female gametes and genetalia. They do however have two distinct mating types which can each only reproduce with the other. They reproduce by laying eggs, and each cherub hatches with two separate minds one of which will eventually subsume the other. Cherubs interact with each other only to mate and to fight over territory, but interact with other species in other capacities. They are able to move themselves through magic and to survive indefinitely in vacuum, and each cherub typically has a territory comprising numerous star systems. I do not know what role Cherubs are supposed to play in Sburb, although I know they have one.
I have also encountered trolls, sprites, consorts, carapacians, denizens, and horrorterrors. Trolls are fairly similar to humans in cosmological function and in body plan but have a number of biological differences. Humans reproduce as Riley described and exit our mothers' bodies in approximately the shape we will continue to have throughout our lives. Trolls on the other hand form from a slurry of repeatedly dividing and recombining reproductive cells provided by many parents and contained inside a symbiotic "mother grub", which the mother grub periodically induces to develop into eggs which then hatch into segmented, many-legged, armless larvae which eventually pupate and emerge in a more human-like form. Trolls do not have distinct sexes, genders, or types of gamete.
Troll blood varies widely in color, and troll metabolic rate and rate of senescence varies greatly depending on blood pigmentation with brown-blooded trolls having similar life expectancies to humans in comparable economic conditions while purple-blooded trolls live for thousands of years and can grow to enormous sizes. There are two subspecies of trolls, one of which can sometimes develop psychic powers with the specific powers depending on blood pigmentation and sometimes become ghosts after they die, the other of which has gills and is therefore able to breathe underwater. Trolls have also conquered a number of other cosmologically similar species about which I know less.
Sprites consume objects and develop personalities based on those objects. If the object in question is a corpse, this process can be used to resurrect the dead. If it is an animal, it can be used to uplift that animal to sapience. If it is not and has never been an animal, the sprite can still develop a personality. In addition to personality features developed through this process, each sprite has a pre-programmed body of knowledge of Sburb and of the path Sburb has laid out for its players, and dispenses that information (and any other information it knows or finds out) in such a way as to guide the players down that path, generally in a frustratingly cryptic manner.
Consorts are small, stupid bipeds who mostly exist to be victims to the attacks of monsters and denizens and to sell stuff to Sburb players. There are a number of different species of consort with different life cycles and habits but in general they are naive and excitable and reproduce by laying eggs.
Carapacians do not reproduce naturally at all under most circumstances, but can be manufactured by advanced biotech facilities such as the ones on this meteor. There are a number of specialist types of carapacian such as enormous living (and sapient) siege engines, but most are of the standard "pawn" model which is largely humanoid, although with an exoskeleton. A carapacian generally has a social function they really enjoy serving and are very dedicated to. Normally this is whatever function they were made for, but some reject than function in favor of another. Carapacians as a species exist to fight eternal wars over Skaias, to create biotech facilities, to serve as the final bosses and mid-to-late-game NPCs of Sburb, and to repopulate planets after Sburb wipes out their native populations.
Denizens do not reproduce; they are created by Sburb directly. Denizens are enormous serpentine beings with immense magical powers who curse planets and create monsters. They like to offer people narratively interesting choices.
Horrorterrors are not part of the Sburb lifecycle; rather they exist outside of it. They are enormous tentacled monsters with enormous and dangerous magical power who live in the Outer Ring. Understanding them too well or communicating with them too much causes possession by them and insanity. I do not know whether or how they reproduce.