I see so many RJ pilots that bring exhorbinant amounts of crap with them on trips.
You see someone walking through the terminal toting an overnight bag, flight case, headset bag, laptop case, and gigantic lunchbox cooler. Sometimes a backpack included too. What is this, a 4 day trip or a Mt Everest expedition? Those huge lunchbox coolers sure don't help our image here either, people look at crews as they walk through the airport, do you want to look like a well dressed professional or someone who lives at home with mom and dad?
Then you all choose to bring it into the cockpit with you. That area between the seats of the airplane is for feet. Its for getting into and out of the cockpit. I don't want to sprain my ankle trying to step over/around your igloo sized cooler that you have taking up the entire cockpit floor space. Not only that, but the entire airplane can see into that part of the cockpit, and I'd rather inspire more confidence in our passengers than have them think their pilots are on a high school field trip.
And all that stuff behind your seat? Good job blocking critical emergency equipment.
The weight and balance form says exactly what is supposed to be in the cockpit - you and your flight kit. Put your overnight bag in the back and leave the other 2-4 items at home! If you must bring something additional into the cockpit, make it be reasonable and keep it out of the way.