I don't fall into those 3 cathegories any more, i used to be a buy oen-get one collector when i still collected transformers RID toys, but i now am almost TF free (sold most).
Now i tend to buy what i like and sometimes buy 2 if i really like the figure in it's packaging, i usually trow out the packaging of what i open if it's not durably reusable or cool looking. Japanse packaging is most of the time reussable(macross yamato's, or saint seiya myth cloths for example), so i keep those, but american toys are usually packed in what i call "throw away" packaging, so they are opened and the packaging directly dumped (for example gijoe 25th anni vehicules).