Having only recently started putting together a Manly only team set collection, if it's not Maroon and White, it's not in (OK, those stupid Yellow Wolverine ones may have to count if there were any!).
I know some team collectors expand their collection based on players (ie including cards in pre-/post- their main teams colours) and or add in the rep cards.
For me, SOO and Australian cards would make nice stand-alone subsets. The Australian colours one would be expensive though, as a lot (certainly not all) of the 1963/64 cards were in Australian colours, plus you'd be looking at hard to find pre-Scanlens cards (eg from Cigarette packs).