Technical you are all human and are bound by human aspects. What I mean is that even playing as another race you can only roleplay so far. If you are playing as a human it really is no different than an alien. Unless in real life you live in dnd.
The only difference is culture. Even humans have variety in culture. So from my perspective what is the big deal what race you play? How are dnd humans boring? They are better than regular humans and you have exciting opportunities to take part in and roleplay.
Seems to me the only boring thing is lack of imagination.
This reminds me of the Greek phrase 'Man is the measure of all things'.
At the end of the day, the various races in DnD (and any well-written Fantasy) have deep lore people want to explore on a deeper level in an RP game OR other races offer mechanical benefits that they prefer over humans.
