I've never really looked back there, and now I'm wondering if it's something I should start treating early. My hairline is maturing slightly, hair overall is getting thinner.
Looks fine, man. You have pictures, so look at it again under similar lighting in 3 months. Don't go jumping on any treatments, though. Better yet, stay off this forum until you're certain since you can drive yourself mad pretty easily.
WH4o Kn4ows Bro, You should see if there are any 'thin' stray hairs on ur crown. They are in indication of miniaturization and thus male pattern baldness