[Furniture] Offer masculine throw pillow designs

Alright, I need some advice. I just moved into my first real apartment, and my living room setup is solid but feels a bit… stiff. I have been thinking about adding some throw pillows to make the space more comfortable, but I don’t want it to end up looking too “soft” or out of place for a masculine vibe. Right now I have a dark leather couch and a couple of chairs, neutral rug, and minimal décor. I like clean lines and functional pieces, but the room could use a little personality and comfort. I have been browsing ideas for pillow materials and textures. I even checked out Alibaba just to see what kinds of fabrics and designs are out there. Not looking to buy anything specifically from there, but it’s interesting to see the range of textures, patterns, and sizes people make. My main questions: How many pillows are too many for a standard 3-seat couch without it looking cluttered? Should I stick to neutral colors, or is adding a small accent color okay? Any tips on textures that feel masculine but still cozy? Open to suggestions from anyone who’s tried adding throw pillows and ended up keeping that clean, functional vibe without going overboard.