CUb,
As life move along on us, do not let it pass you buy. Good time as any to get back in the fold and start enjoy the thrill and beauty of the open road. If you do get a bike, be it a BDM or something else, more than likely you will enjoy it even more.
If you have been off the seat for nearly 20 years, it will come back quick, however at the same time any bad habbits you had before will also along with picking up a few new ones. With that said, I would highly suggest that you get up with the local MSF course and take one.
Not only will it help you learn or re-learn the proper way to deal with things, but may also help with insurance rates. One of the good things with a MSF (Motorcycle Safety Foundation) course, is that they treat all riders from well seasoned to total newbees like they have never seen a motorcycle, let alone rode one. Being such they go over all the basic and give you plenty of practice using their bikes. They give a solid foundation of proper countersteering, braking concepts, handling and many other items that will help even remind some of the older dogs of some the bad habbits we develop and maybe get out mind back to the correct concept that could help when least expected.
Good luck and let us know how you roll and make out.