I have a few comics, but my most favorite and cherished comic is Realm of Itria. It's a medieval fantasy comic but it's framed more as historical fiction. It's not set on earth, though.
My inspiration was my university classes and my husband-to-be. It started back in 2014 and we called it "The Story" for the longest time. We're both history buffs and would often be disappointed by what the fantasy genre has become in media. Not that there's anything wrong with using your imagination and creating something inspired by medieval aesthetic... it just seems too modern in style to us? There's lots of aspects of the middle ages that were awesome and interesting. We just wanted to bring back social systems like serfs, fiefdoms, feudalism and vassalship. We wanted to incorporate it organically into a series with knight armor that's more closely historical than what popular culture dictates as "medieval". Which is super vague and mostly rooted in what the 19th century romanticized and perceived of the middle ages/renaissance.
We also were BOTH tired of no strong female lead characters. We wanted neither a damsel in distress, nor a "I'm a girl so I'm overcompensating by being mean" character who's way too on the nose. We created a classically trained, strong Dame who is the focus of this story. We also wanted an ethnic lead. She's rooted in independence, leadership, fearlessness, loyalty and good. She's strong both inherently and physically. Her identity isn't based on a male. (If anything one of my male characters revolves around her more, but that's his personality and obsession.)
Then we wanted an outlet to explore moral ambiguity, ethics, philosophy and religion. We wanted to make something that conflicted the reader and charged them emotionally. We also LOVE making up societies, politics, religions and cultures in general for this story. So Realm of Itria's world was born and our combined interest in historical literature, politics, sociology, religion and a bit of anecdotal evidence has driven us to make something that we could be proud of, that we could lace our knowledge into and make little jokes and statements through our characters and settings.
So really, my fiance and I wanted a realm where we could explore aspects of things we learned as young adults to express ourselves in a creative way, represent the middle ages and have fun. As for our readers, we want to entertain them. It's not ALL heavy subject matter, it's actually a lot of jokes. We were inspired by what we learned to make a world to get lost in. We want you to feel like these characters are your friends you can come back to... and who knows who you'll champion? Realm of Itria has only been ready to make recently. Writing the whole plot took years. It's very intricate, so I'm only on issue 4. 
