Yeah, I remember keeping a lot if stuff in the chest in Skyrim, because there were many unique items and armor that weighs so much. In the Witcher I sell all the junk I find like animal skins, candlesticks and the like to make space. Those are the really heavy things when you rob every villager like I do
I recently sold a lot of stuff because I had about 20 useless weapons and some inferior armor. Because most things don't weigh much you can still keep a lot of souvenirs (I'm not selling my Nilfgaardian dress).