Wow! Your experience is MUCH similar to that of mine.
My firs creed sampling was GIT and the first time I thought "meh?". Why all the hoopla? There's nothing great about this stuff. I'm not buying this.
Over time, I actually see that my olfaction is improving a lot (I cannot believe I have started to hate one man show, which I liked very much in the past). And now I tried GIT just today again, and I'm very impressed with the quality. While I think that it may not be the best from the house of Creed, it definitely is of fine quality.