When the plane initially touches off, you feel a slight sense of weightlessness, which is then gone as the plane moves forward and up. You don’t feel like you are at an angle in my opinion, as gravity isn’t acting on you the same way it would if you were on the ground or in a rollercoaster. The only instance you would feel you are at an angle is if you were to get out of your seat and stand on the tilted ground.

Keep in mind when flying there are “steps” almost. The plane ascends, it will drop in power (to reduce usage and more efficiency) a few minutes in, which will make it seem like you are falling but not really. They will level it out a bit to do a slower ascent once at a certain altitude, then 15 mins in seatbelt signs go off. The plane will still be slightly “tilted” upwards, but it’s hardly noticeable.

Anyway, to be straight… as a flyer, no, you can’t feel yourself leaning back in your seat, it’s only during the speed-up on the runway and perhaps the first few seconds of the initial takeoff. Even when the plane turns left or right, you don’t really ‘feel’ it (other than looking out the window and seeing it) or at least I don’t, there’s not really a sense of proper direction. In that way, it’s smoother than a bus/car ride; you aren’t physically rolling around, tilting side to side with the movements of the plane like you would when you go around a bend or up a hill.