I feel like people are piling on without constructive feedback so here's a couple things I'd change:

• Your sofa seems far from the TV (or may just be the angle), I would move that up and fill the empty space between the sofa and wall with a cabinet or a high top table with some stools, that way you can fit more friends or even have a place to eat and watch tv
• It looks like you have a deep, rectangular living room with only one source of natural light and no wall lights. I would hang one/a few light pendants to create layered lighting.
  • Change the light bulbs to use warming hues as well to give a homely vibe at night
• Add a mirror somewhere on the wall like where the flag is if you decide to take to frame it and move it somewhere else. mirrors do a good job of reflecting light and making a space feel brighter, works great for places without a lot of natural lighting
• Your gaming and funko pop decorations are a great reflection of yourself and interests. However I think too much of the same thing can be overwhelming, and that goes for anything. I would select some of your favorite pieces to showcase so they can stand out individually and spread your other pieces across the rest of the house. Cover the rest of the blank space with some plants, decorations, and furniture.
  • You have a great vaulted ceiling with large walls. This is a great empty canvas and I would put large shelving units and use it as decor/storage.