NW2 i'd saw man but at the same time some people just have that sort of hairline from the start - have you noticed your hairline come back in the corners much from say 10 years ago?
Its good that you've started treatment. I don't take finasteride but i do use RU which seems to be helping re gain some lost ground, however as some people have told me, RU is a fairly week anti-androgen . If you want to look at topical anti-androgens follow the ODM post on the anti-androgen section - some good info there.
Oh, and you don't at all look near 30 whatsoever dude. Embracing treatment now hopefully means you wont have to worry.