My initial focus was to get everything I could. In the early 90's this was farily cheap by hitting loads of car boot sales. I sirt of started with completing a loose collection of figures, vehicles and playsets with also the aim of getting as many of various things as I wanted as a child but didn't have (e.g. 100 stromtroopers, several At At's)
This became a much bigger ordeal than I originally imagined as I was given the Swansweet book that showed everything!! So I settled for the standard figure line (No vc, blue snag, DT sabers) and what vehicles playsets I could get. Nothing boxed or carded and didn't exptect to pick up any of the US only releases of things.
Thing is so much can affect a focus; money, opportunity, determination, arrogance etc. I doubt there are many people who started with a clear focus that didn't change it/add to it.
I started with a complete set of standard loose figures. I know collect Palitoy carded figures and Trilogo miscards...I never saw either of those happening when I started back in 93.
Once I discovered collectors shops, shows and the internet it all changed!! Must be evenmore likely that a focus will alter as those things are readily available now!