On the crj and Erj-145 valet checked luggage are valet checked for weight and balance purposes as the cargo in the rear of the aircraft balances out the nose heavy aircraft.

My best advice (coming from a regional flight attendant). Never pack any valuables medications or your computer in your larger carry on (rollerboards, large duffels, and backpacks) as the flight attendant(s) will tell you to valet check your bag.

Also, your bag should be returned to the gate once you land but if you don’t pick it up at the gate it will be sent to the baggage claim. If it is sent straight to the baggage claim it is most likely due to the airport being short staffed or because weather conditions might restrict what the ramp agents can do.