It would be really interesting to have your feedback on how it feels on the Thrustmaster wheel. But if you are using it to control GPB in default steering, I believe learning DS could greatly mess up your usual steering. That is the same reason I never switch to the default steering while using the wheel. If, on the other hand, you mostly use a joystick or a gamepad with GPB, I'd say absolutely go for it! I personally have no problem either using the keyboard or my HOTAS system with other bike games, because these are very different approaches to controlling the bike. With the wheel I just imagine I'm pushing on the handlebars, with the joystick it's like I'm tilting the bike itself.
You just need to burn the philosophy of counter-steering into the back of your mind. A bike turns only when it runs while leaned over. Once it's leaned, it tries to fall inside. You have to catch it and maintain the angle by turning the wheel (and the bars) inside a bit. However. To achieve that lean you mostly have to turn the bars outside first: the front wheel goes to the outside from under you and you fall inside with the bike. At very low speeds counter-steering is almost unnoticeable and you can also affect the leaning a lot with your own body weight. At higher speeds you'll be able to see it clearly. At even higher speeds gyro effects come into action.
Direct steering will teach you a lot about motorcycle handling. Not to mention it's extremely addictive when you are finally getting it right. Also, I'm sure your wheel will make a much better job of presenting you with the forces involved.
By the way, I had a long history with bike sims, starting with the SBK2000/2001 titles and GP500. But it wasn't until I tried direct steering when I started to finally realize how exactly do you handle a motorcycle and why does it behave the way it does.
You just need to burn the philosophy of counter-steering into the back of your mind. A bike turns only when it runs while leaned over. Once it's leaned, it tries to fall inside. You have to catch it and maintain the angle by turning the wheel (and the bars) inside a bit. However. To achieve that lean you mostly have to turn the bars outside first: the front wheel goes to the outside from under you and you fall inside with the bike. At very low speeds counter-steering is almost unnoticeable and you can also affect the leaning a lot with your own body weight. At higher speeds you'll be able to see it clearly. At even higher speeds gyro effects come into action.
Direct steering will teach you a lot about motorcycle handling. Not to mention it's extremely addictive when you are finally getting it right. Also, I'm sure your wheel will make a much better job of presenting you with the forces involved.
By the way, I had a long history with bike sims, starting with the SBK2000/2001 titles and GP500. But it wasn't until I tried direct steering when I started to finally realize how exactly do you handle a motorcycle and why does it behave the way it does.