I'll answer your questions.

I like to spend my time playing mostly rpg/open world games. My favorite series of games include the Dragon Age series, Fallout series, Elder Scrolls series, The Tales of....series, Mass Effect series, the Dragon Quest series, Final Fantasy series, and some other games thrown in.
How often do you play them?I mix it up everyday depending on my mood.
Are you a hardcore player or a softcore player?I would say I'm a moderate gamer, I've been playing video games since I was 5 with my first experience being on the original NES and I'm 34 now and it's been amazing watching how games have evolved over the years.
Do you ever play any indie games? (Exp: Undertale, Bendy and The Ink Machine, The Witch's House, Hello Neighbor, etc.)I've played AdventureQuest, DragonFable, MechQuest (those are online) Gone Home, I plan to get We Happy Few this friday, No Man's Sky, Angry Birds, the Sam & Max series
What sort of gaming system(s) do you have? (Exp: Xbox, Nintendo DS, Playstation, etc.)Here's what I have currently: Playstation 2, 3, 4, Nintendo Wii U, Nintendo Switch, Gameboy 3DS, rereleased classic NES & SNES, a gaming PC, a Gamecube, and a Nintendo 64.
Do you ever play online? How often?Yes, I play online once in awhile although I tend to play solo when I do. I currently have on my PC Star Wars: The Old Republic, World of Warcraft, Wizard 101, Pirate 101, Legends of Equestria, Elder Scrolls Online
Do you enjoy co-op games?I don't usually have people to play with and I don't normally like playing online with a bunch of people I don't know, so I would say no for now.
What's your favorite video game?Tough choice! I have too many!!