rooting = Rooting Explained + Top 5 Benefits Of Rooting Your Android Phone | Android News, Reviews, Applications, Games, Phones, Devices, Tips, Mods, Videos, Podcasts - Android Police
ROM = Custom ROMs For Android Explained And Why You Want Them | Android News, Reviews, Applications, Games, Phones, Devices, Tips, Mods, Videos, Podcasts - Android Police
bk2fut and Knightprincess13...
you are confused ... i suggest you read the 2 links above.
once root.. you can do what you want.. and forget it; if you choose.
You can accept updates from carrier, but it might kill your root and close it. this might affect some apps that require root (ex: apps2sd). which will affect all apps that was used in apps2sd!!!!!!!!!!!!!!!!!
you have to wait for dev to put out the update in rooted version. takes less than a weeks for someone to do. It normally happens within 24hrs!
you can also choose to use a ROM with no skins or a different skin. up to you.
you should also read the 2 links above.
Rooting does NOTHING to your phone's look or feel or function!!!!! it does 1 thing: give you full access to your phone's root directory and control over it!