Should I jailbreak my ipod touch 4th gen?

It's really a matter of personal opinion. I myself prefer not to so I can get updates and all for my apps and iPod updates. If you do decide to jailbreak, I heard that the program Spirit works great. Supposedly if you decide to change it back to it's original un-jailbroken condition, doing a full restore will put it back to it's factory default settings. Be aware though that jailbreaking will void your warranty. Also I've heard if you upgrade to the 4.2 iOS, there's no way to jailbreak it. Good luck on your decision and hope I've helped. =)