Cargo view camera - it's very handy, especially hooking up my 5th wheel, though selecting it while driving will let me peek into the bed for a minute to check on things.
360° view - I really like this, it makes getting centered in small parking spaces a breeze, and backing into enclosed spaces so easy.
I've got TTPMS but haven't installed it - it's so much easier to simply purchase a dedicated system with screw on sensors that supply much more information than the Ram system. The Ram system is difficult to implement apparently.
Blind Spot and Cross Path Detection - the way people are driving these days, this has saved my bacon more than once in WalMart parking lots. The blind spot monitor will scare the snot out of you if you signal for a lane change too early after passing someone.
LED tail lamps - everybody wants LED lights. Save yourself the trouble of converting over and just start with them from the factory.
Red tail lamp bezels - really? Aren't tail lights and brake lights required to be red? My rear turn signals are yellow and that's fine with me. They're bright and the contrast might help other drivers know my intention easier.
Trailer Reverse Guidance - if this is the cute little knob on the dash for backing a trailer, I don't have it and don't care for it. It is a pain to set up correctly and having more than one trailer makes it a pain. Just grab the bottom of your steering wheel and turn it the direction you want the back of the trailer to go. It's not rocket surgery.