Good writing is hard. Word choice is more about style and vibe than good writing. For example, I can tell from your first paragraph that the character is a lit

Good writing is hard. Word choice is more about style and vibe than good writing. For example, I can tell from your first paragraph that the character is a little boring, a bit plan. They get to the point and don’t have time to mess around. The character in your second paragraph is a pompous ass, they think highly of themselves, perhaps love to hear themselves think. Like a teenager who discovered depth and can’t wait to tell everyone. Both can be fine. It depends. Personally I like it when authors have something to say and don’t hide behind grand flourishes. Use the big words where they shine, stand out, and make a point. Let your story do the work, not your words. But that’s me. Some people like to slug it out with the author in page after page of inscrutable prose. Hell, just look at Ulysses. edit: You can use variations in style also. A character that talks like your second paragraph, but when their grandma asks about the room they go "It was green." Oooof sizzle. Drama! What happened here!? Tell me more.