This question always makes me wonder about the Avari. About what they were and how they lived. Tolkien lavished so much attention on the other elves (esp. Noldor), yet these scarcely warrant a footnote. Just how elf like are they? I presume they probably have more in common with Silvan people than any others we've seen, but how much?
Tolkien says they remained wild, but what exactly does a "wild" elf look like in ME? I wonder if they wore face-paint while out boar hunting or had wicked tattoos like the Maori.
Some fans have speculated that many (if not all) of the Avari may have been corrupted by Melkor/Morgoth and became the basis for the Orcs, but passing mention is made of them during the Noldor's grievances in Beleriand and this is likely thousands of years after the coming of orcs. Thus it seems unlikely that all of them (if any) were twisted into those vile creatures.
I wonder if the Noldor thought lowly of them. Maybe they are where the rumor of them being befouled originated. The Noldor being prejudiced isn't exactly out of character for them. If that were the case, it may have influenced tales of the Avari passed down in Eldar legend, thus casting them as shadowy figures. Kinda like how people treat gypsies.
I wonder what they were doing during the War of the Ring.
I wonder about the Avari a lot, I guess. It's fun to speculate, since we'll likely never know.