Hey! I’ve used peel-and-stick wallpapers a few times, and I actually think they’re great if you’re looking for a temporary solution. They’re super easy to put up, and you can even remove them without damaging the walls. The only downside is that they don’t always look as high-end as traditional wallpapers.
As for styles, there are so many options out there! I personally love geometric patterns or simple nature-inspired designs. You can find a ton of inspiration on Pinterest or even check out some of the modern wallpaper trends on this
Wikipedia page if you’re looking for ideas. What kind of vibe are you going for in the living room?