Here is how I justify that Creative is a horrible trait: It is granted that Creative helps at the start, but all the other traits help pretty much throughout the entire game. +2 culture a turn is EXTREMELY small late game, especially when you're going for a culture victory and you're getting easily 300+ culture a turn. I just think that it needs something else to justify using it. Think of Creative this way: it gives you two free monuments (obelisks) per city, which is equal to 60 hammers (30*2). While Expansive (+3 health) is even greater than an Aqueduct, which is 100 hammers for +2 health (thus Expansive would be "worth" about 150 hammers). This isn't even counting the fact that Expansive helps in production of Granary and Harbors (much more useful than a Theater and Coliseum). Sure if you plan to build a Coliseum and a Theater in EVERY city then it saves you some hammers. Hammer wise, Creative saves you 85 hammers of production (60 from Coliseum and 25 from Theater) while Expansive ONLY saves you 70 hammers (30 from Granary and 40 from Harbor). So if you calculate it only by the fact of hammers you're saving, you get 220 for Expansive and 145 for Creative. Which is a significant difference, especially considering that more people build Granarys and Harbors than Coliseums and Theaters.