I think modding is worth it.
There's always something you can improve on, in just about every car. The money spent might not make sense, but if you keep your eyes open and do things right the first time it's very enjoyable.
I always say "This is what the factory SHOULD have done..."
==2012 Kona Blue Mustang V6==
==1995 Light Iris Neon Coupe==
==2005 Sangria Red ZXW==
Sold but not forgotten: 2001 ZX3, 2007 ZX3, 1972 Skylark