Last time I played a small PC, it was a Savage Species campaign and I was a pixie fighter named Nice Sunnyday.
I usually DM and have players that play halflings. Despite that, they usually figure into my settings, being a cousin of mankind, they typically reside in villages or ethic shires together but are fairly common. They played a large part in my Fantasy naughty word Nam' game where the PCs were part of a military sent by a large and powerful country to another continent to a jungle kingdom where nobody speaks common and they have a much different culture, but are being invaded by necromancers. All the Vietnam War tropes are in play. So, to match certain issues of racism, due to socio-economic issues that the human government did not care about, halflings were disportionatly conscripted to go fight in the war and formed a large part of the army there. There they were seen as uneducated rural hicks and often treated as such by their human and elf officers. On the first night in their permanent base, the halfling ranger PC went out to explore the base. He ended up in the trenches where he came across the halfling bard sergeant and the squad of halflings he had put together sitting around drinking ale and smoking pipeweed. The sergeant finished the song he was playing on his lute, said "welcome brother", held up a closed fist of resitance, and followed with "naughty word the tall man's war." (Sergeant's story was that while he was immune to conscriptionm his younger brother who had just married and had a family on the way got called to serve. At his insistence, they swapped identities and he showed up as his brother to be sent to war.)