As many tastes as heads, and as different.

[Tantos son los gustos como los rostros, y tan varios.]

Baltasar Gracián y Morales (1601-1658) Spanish Jesuit priest, writer, philosopher

The Art of Worldly Wisdom [Oráculo Manual y Arte de Prudencia], § 101 (1647) [tr. Duff (1877)]
    (Source)

(Source (Spanish)). Alternate translations:

There are as many Opinions as Faces, and as great difference amongst the one as the other.
[Flesher ed. (1685)]

So many men, so many tastes, all different.
[tr. Jacobs (1892)]

There are as many minds, as there are heads, and as different.
[tr. Fischer (1937)]

Tastes are as abundant as faces and just as varied.
[tr. Maurer (1992)]