The way OBEs feel can vary greatly - I've had OBEs that felt light as a feather, I've had OBEs that felt "normal", and then those that feel like the whole astral world is a thick heavy clay that you are having to hold together with your mind. I imagine that last one is where I didn't have much energy or wasn't vibrating at a higher frequency. For me, those that feel normal are the most common, although that could be due to expectations.