Ignoring Creative Director, I think the concept artist, environmental artist, or level designer sounds like I’d enjoy it the most. Monetization designer would easily be my least favorite. Maybe once I get sucked in the industry I’ll feel differently, but I never want to make paying to make a mundane part faster a part of a game I make. I’m a little confused what the “Network Programmer” does, based on Liz England’s example.
I also think game design is only focusing on the aspects the players will notice (rules, levels, enemy patterns), while game dev includes all aspects of a game, such as programming and unnoticed things, like when will part of the level despawn.