I can relate. The few times I have felt stable its odd very odd. We get used doing aerobatics all the time so flying straight and level is a new idea and an odd feeling. I often dont even know how to act properly. So your not alone. Im not stable by any stretch but the few times I do fit in the stable category I agree its like is this it? I hope that makes sense. I know it is a just getting used to it thing so give it a try for a while and see how you feel after a while.