Coming from a Java background learning C#.

The only question is, why? Why do I have to be so verbose when defining 'virtual' methods?

You mean just adding "virtual" to the method? You should be rejoicing that you have real properties.

To make things really clear and to avoid accidental fuck ups; be it by you or some-one else if you're working on a team...?

coming from C#, what do you mean verbose?

coming from verbose, what do you mean C# ?

Also, you don't have to use virtual/override; you can just shadow the base implementation by adding a method with the same signature (to which your ide should say "hey, add a new keyword if you really wanted to do that but if you don't that's cool too")