It sounds to me like you are off to a great start by purchasing the samples. Sample, sample, sample !
As you may be beginning to tell, it's possible to get all wrapped up in the fragrance hobby : There are simply so many different things to try, and to form opinions about.
But I think it's quite positive that you have one fragrance that you already *know* that you like. Having a jumping off point is a good thing.
Also remember that things which may smell too heavy now that the weather is warming up may smell much more appropriate in colder weather.
One way to work your samples is to try a different one on each wrist. If you have two that seem similar, having the two to compare really helps you get a handle on the various notes that each one have.
You may want to post over on the female fragrance forum as a means to get more responses to your post. There are many knowledgeable folks here, and having the chance to tap into their experiences is a pretty great opportunity.