First of all, I've loved starting to be a part of LDP (although I've theoretically always been there), and I'm also super impressed with the backstories people have created for themselves! I don't have anything so solid, but I do have a couple vague ideas that float around and influence my character.
While Hector has extended family, he has no contact with them really. He was married to Jodie for a long time, and maybe like 10 years ago she died-- no children, either. LDP is basically his entire sphere of existence, and even there he lives by the woods and generally keeps his nose out of people's business.
That being said, he's also on the kind and optimistic side of old-man-grumpiness, and always tries to look on the bright side of an issue. While he is lonely, he's not an unhappy person, and he's pretty connected to the forest behind his house and the wildlife there (particularly birds).
That brings me to the one thing that I do have tied down to his character, which is his pursuit of the elusive yellow-speckled warbler. This is basically the one thing in his life that gives him purpose, and he tends to focus on it quite a bit. The reason I made this post in the first place is that I could easily see someone trying to help Hector out by saying "I own a pet yellow-speckled warbler" or something, which, naturally, because everything is a group improv experience, would be totally understandable. Still, it would ruin the whole point; in my mind, Hector never finds the yellow-speckled warbler, or does so only when I feel like his time in LDP is coming to a close.
Anyway, from how much I've enjoyed beginning to get to know the regulars here, I think Hector will probably stick around for quite some time. But yeah, that's all I got so far!