I'd have to agree with LordCyrus, I do love the hunt for figures.

I think what I've found most rewarding was how my love for playing with the toys in mock battles across a bedroom evolved into a greater appreciation for the series then into the collectable stage that I see them in now.

That and being able to own some favorites that we couldn't afford when I was much younger (like my G1 Omega Supreme and Megatron reissues )!