Would be nice the the [Home] key selected your home world, it's usually easy to refer from there and it would be quick shortcut to build cap ships/titans/1st super weapon from.
The [End] key could also move to the most recently colonized planet - which is usually where the bulk of your fleet is.
Maybe the [Page up] / [Page down] keys could move to next/previous planet that was colonized relative to the currently selected one.