I can certainly tell you I've been inspired by alot of people, but I'm not quite sure if I've inspired someone else... But yeah, you don't have to look far to find inspiration. Some fabulous preset makers have inspired me to learn myself, music has inspired some of my characters and helped them evolve, pictures have inspired my drawings- the list goes on! My biggest inspiration would be music, by far.
I guess I have inspired people to make unicorn fox characters, after I made a thread about the species. I've had people come and ask if it was alright with me to make one of their own. I am perfectly fine with it.
I've inspired someone to make a robotic preset once after they saw the preset of my cyborg fox from outter space. I made a robotic fox character because Tearless made a cool robot lion that I thought was so neat. Seeing her robot lion inspired me to make a robotic character of some kind. So I designed a preset for a cyborg fox.
Watching my boyfriend play a game of S.T.A.L.K.E.R. inspired me to make a kreptis character that resides in the shadows of Chernobyl. And that's how Vixyne was made.
I have ever inspired someone, I would never know, haha. I hope that I have sometime in the past. It would fill me with great joy to know that someone was inspired by something I had created or thought of.
In this weird day and age, I've come across plenty of things that have inspired me. Most of the inspiration derives from artwork and even a few short stories I read every now and then. Taking a little stroll through Tumblr (I could literally spend a whole day on there and not regret it) sometimes fuels my inspiration with all the neat image manipulations people post/reblog. Music too, though not as much as artwork.
I too am a little disappointed in the amount of copying I come across. All I can think about is how angry the original owners/creators must be to find that someone took an idea that they put their blood and sweat into. I remember someone once used the download link to a map that I spent a good month to create and claimed it as their own. Another time (Way back in the day. I'm talking like two years ago) someone used the same exact layout I had in a topic, changed the words, and didn't even bother asking me (Oddly, that topic was deleted long ago. I can't find it anymore).
It saddens me to see the amount of plagiarism around, too. Though I am glad to see new things popping up left and right every once in awhile.
Have you seen something that inspired you?