How did/do you approach the collection?

I have just started with UFO 50 and only played the first three games chronologically. I got a crown on Barbuta and am currently striving to get further in Bug Hunter (enjoying it a lot but I keep running out of time before killing em all!). I'm currently going at it in a chronological completionist way, but I'm just wondering if maybe the collection is better experienced by sampling more of the games at once.

How did you approach the collection? Is there a way you would recommend?