Congrats. I did the same kind of thing when I got back into TFs, with Computron. I had everything but Nosecone as a kid and had been using First Aid as a stand in. Nosecone was, I believe, the first TF I bought post-childhood. It was a great feeling.
Nostalgia... that's it, that's the pervect word to discribe it. It's easy to forget why I got into collecting in the first place, ya get caught up in that "got to have em all" mentality, and forget it was the nostalgia of owning something from my childhood that made me start buying Transfomers originaly. Yet another reason this is one of my favorite pieces