I was never a big fan of toppers since my basement ceiling is low anyway. I always sort of scoffed at them even when I saw them, unnecessary bling. But, then Lasseriffic did a AC/DC train topper and I saw it in person.
Certain games it's just cool - Addams, Whitewater & some of the Lasserific stuff.
Toppers are not for everyone and I don't think every games needs it. I'm still not big on them, but a few are must have bling.