Oh boy... one of my sims is best friends with Elsa Bjergsen, and I'm planning to have them date when they become teens. Well, Elsa aged up into a teen, and she looked a little different to what I expe...
I find that Max actually ages up pretty well except for his eyes being too small and his nose being a little wonky from the side. I just make his eyes a bit bigger and tweak his nose a bit, and he usually looks good after that.
I have to agree about Alexander Goth...such a cute little boy, who ages up badly. But I love him so I always give him some CAS plastic surgery and he manages to look good after that!