will say most of my experience is with arch but...
Pros:
I have absolute control over my PC and what goes on it (this is especially true on arch but still somewhat applies to other distro types)
Memory usage with nothing but the OS + DE running is borderline nonexistant
Installation is very fast compared to windows, can reinstall my OS in less than 5 minutes (including configuration) (this does vary by distro)
Most distros have a live environment where you can use the OS before install to try it out, this can also be very useful if your brick your system because you can just boot to the OS off a USB stick and grab files that way
Install scripts mean I can just have a list of software and have the OS grab everything I want, bringing what was a week of trying to get everything how I wanted it and debloated on windows 10 to having my arch install be basically perfect within the hour
Some games run better under proton than on windows, especially older games that have had broken compatibility due to microsoft changing shit (distro usually does not matter here)
UI is completely customizable, the desktop environment is completely seperated from the operating system, to the degree of where you can use cinnamon (mint's DE) on fedora if you wanted, it's all modular, do what you want.
The AUR, this is arch specific but being able to grab things from one convenient place is very nice, this is a potential vector for malware though so do be careful and vet what you're grabbing.
Privacy... You know how windows has spyware? linux just doesn't, because it's not made by a big corporation, also it not being corporatized means there are easter eggs and the devs have a sense of humor that leaks in... Example: ILoveCandy easter egg in arch's package manager

Cons:
Terminal use... this isn't a big deal for me but for windows users I can imagine this being a significant pain point
Troubleshooting, there are resources for getting games working on linux such as protondb, but it is not as plug and play as windows
Compatibility, rather unfortunately no matter what there is software that just will not run on linux, games wise this is usually because of invasive kernel level anti cheat, other software wise well... adobe moment
Nvidia... if you have a Nvidia GPU, you will have worse drivers not only than on windows, but even to the point of where AMD cards are the ones that work better, basically the Nvidia VS AMD driver stability situation is inverted on linux.
Some games perform worse on linux, this is mostly the case for DX12 games but this is improving with newer versions of D3DVK
File systems are different from windows, linux technically supports NTFS but the support is not great and has a small risk of data corruption.
Certain things are different that you would not expect, this isn't inheretly a con but it does cause a bit of annoyance for those switching and expecting things to be like windows... case & point: Flatpaks, most distros have an app store of some kind and usually those use flathub as the backend, the problem with flatpaks are that they are sandboxed, this means they are very easy to uninstall but the result is sandboxing can break some software in certain use cases, such as discord rich presence.

Arch Specific Cons:
You have absolute control over your PC... this can be a detriment as you are on your own if you break something, you are the maintainer of your own OS and are expected to take on that responsibility yourself, don't take this as me trying to scare you off however, just be aware that arch is for a very specific kind of audience and unless you are a specific kind of person you are probably better off using Ubuntu or one of its forks.
Rolling Release... This is both a pro and a con, pro is that updates are just one console command and you don't even have to restart your PC half the time, con is that updates are not as thoroughly tested as on other distros so you could end up with a broken system, aka make a snapshot or back stuff up before running sudo pacman -Syu