In real life, I'm a pale blonde trans woman with blue eyes. I suppose she's more similar to me than she is dissimilar...? Dunno. I have a few specific characters who I like to play.
I tend to create Mareth, my spellsword, in my first playthrough of most every fantasy RPG. Mareth is pale with long black hair and purple eyes. If there are elves in the game, she is an elf, but elves are, aesthetically at least, simply humans with pointy ears. She uses lightning magic and conducts it through her blade, preferably a light fencing blade like a rapier. Her story is much too detailed to go into here.
There's also Mirelle, my rogue who is NOT a thief! She's a treasure hunter, an explorer, like Indiana Jones or Lara Croft or Locke from Final Fantasy VI. She's tan because she spends a lot of time outdoors hiking to different ruins. She has brown hair, which is just a tiny bit too short to touch her shoulders, and looks disheveled and windswept, and green eyes with tiny flecks of hazel. She favors whips and crossbows (but not in D&D because D&D crossbows suck! :>), and she carries a variety of gadgets that help her detect and avoid the various traps that ancient ruins ALWAYS HAVE!
Then there is Mily Marteaux (pronounced MIL-lee mar-TOE. Fun fact: I named her after my favourite mechgun in Phantasy Star Online, the Mille Marteaux), my gunslinger, who I play in settings where guns (at least revolvers, no flintlocks please :x) are a thing. She's a tan redhead, who wears her hair parted in the middle in a chin-length bob cut. She has green eyes and wears long leather duster coats, flowery blouses, deerskin pants with those little fringes on the sides of the legs, cowboy hats, and boots with spurs. She has a Texan accent, and sometimes goes by the alias "Two-Gun" Mily because she likes to use two revolvers.
In settings steeped in Asian culture, I like to play Sekihara Setsumi (Japanese format! Her surname is Sekihara!). She's a very Mulan-like character, except not Chinese, lel. She's the daughter of a daimyo, she has no siblings, and her father is dying of old age. So rather than be married off and see her family name end, just because she's not allowed to be a samurai, she steals her family's heirloom katana and sets off to become ronin, teaching herself the sword and seeking out forward-thinking masters who will take on a female student. In some games she strays to more medieval English lands in her journey of self-improvement. She has an Asian skin tone, dark brown eyes, and waist-length black hair which she wears in a high ponytail, like a feminine version of a topknot. Fun fact: in my Pathfinder game, the Sword of Sekihara was an intelligent item which could speak to Setsumi telepathically, and it turns out the sword had a female personality the whole time :>
I also have Esmerelda Vitteri, a Romany girl whose clan was one of the performing caravans, a travelling circus. Esmerelda was the knife thrower. She's also a rogue, but she IS a thief. She had her fortune told and dreamed of the tarot deck, and spoke to some of the cards, and then started to multiclass as a sorceress (and eventually an Arcane Trickster! Hurray!). I know, I know. My Gypsy gal is a thief and a fortune teller. I like the archetype, so nyeh. Anyway, she's got a dusky brown skin tone and long black hair, and blue eyes, and she likes to wear bracelets and lots of colourful dresses, and play tricks on the party. :>
So, I guess I like to play characters that I can identify with on a basis of gender and ethnicity, but I do like variety too, especially playing characters from cultures that I really like. :>