I am new to D&D, so as far as I am concerned these are the starting races. I see no reason to cut any of them out, even those sucky halflings have a place as Dragon-feed. Except for Aaracockra, they are weird. I don't see an appeal in Bird-people.
On Classes, all of them and more IMO. I am happy to add any number of classes to my world, so long as they are actually able to fit. No Sci-fi/aliens yet, but we will see if they ever do this mythical "Planescape" I have heard of. Even if they do, my multiverse has mostly collapsed, so there would probably only be 5-6 other Planes to head to.
On Classes, all of them and more IMO. I am happy to add any number of classes to my world, so long as they are actually able to fit. No Sci-fi/aliens yet, but we will see if they ever do this mythical "Planescape" I have heard of. Even if they do, my multiverse has mostly collapsed, so there would probably only be 5-6 other Planes to head to.