Low-level Humanoids - D&D doesn't need a bajillion humanoid races to fill in the low-level adventures. What's wrong with using ... I dunno... HUMANS?!? If you're going to have kobolds/goblins/hobgoblins/orcs/gnolls, make that racial choice meaningful to the adventure
Probably boring for you to draw, too.
While the 'old guard,' orcs, goblins, hobgoblins, bugbears, kobolds, gnolls & lizardfolk, have pretty much crept into useful niches, every time I see a *new* humanoid race, like tasloi, flind, nycter, witchknives or whatever, I wonder if they are really necessary, or could just be replaced with those already present. Do I need an Urd when I can just have a dragontouched kobold with wings?
Even some of the 'old school' humanoids, like locathah and tritons annoy me, as I'd rather just have some sahuagin not be evil, and some merfolk be all lawful and stuff.
So what is needed to be seen more?
I grow weary of every low level adventure it seems having Goblins, Kobolds, Gnomes or Halflings as the antagonists (what is with the shorties?).
I saw one proposal for a low-level encounter that dealt with primarily giant ants as foes, who turned out to be under the control of a crazed dwarf that had slain their queen and crawled into her carapace, to somehow trick the ants into thinking that he was their new queen...
Another low level encounter involved a necromancer who was seeking bodies for her work, and would send out multiple undead created from each body, one a necromantically charged 'ooze' made from cold, dead blood, that would crawl over and suffocate prey, another made from the removed skin, which was cured to leather-like toughness and sent crawling forth to entangle people. The skeleton would then carry the bound and drowned human corpse back to her, and she'd make another group of undead from that body, saving the muscles, organs and veins to make a fourth undead, another ooze, that had weak acid, weak blood-drain and a little bit of bludgeoning damage from it's muscle-y slams. (She didn't send those out to gather bodies, because the acid damaged the skins and the blood-drain made it harder for her to make her little blood oozes. They were strictly for home defense.)
Four different 1 to 1/2 HD undead, each using different combat mechanics, all from the same body, and only one of them a 'boring old skeleton.'