If, by Adam Young, you mean the Antichrist in the novel Good Omens by Terry Pratchett and Neil Gaiman, then yes. In fact everything Adam young is noted to do - fighting, philosophising, base-building to name but a few - could be considered a hobby. He has no activities in his recorded life that could not be regarded as hobbies.
If, however, you refer to Adam Young, the electronic musician, he has a fondness for Photography, and views himself as an amateur photographer.