Hi! Sorry to go back like 10 pages but just wanted to circle back to this...
I like flying Virgin domestically, however yes I fly a fair bit internationally and it has been spread between QF, AA, SQ and NH this year - so an even split of OW and VA partners. Hence I don't mind trying to chase both. Primarily I'll pick QF especially when there is a good business lounge available but on a lot of routes a VA J flight is the same as QF flex Y so I'm often tempted take that instead. VA are also more generous with their elites (ime) for same day schedule changes and being a plat there keeps me at the top of the tree for that, plus I find their call centres easier to deal with.
I generally grind through my renewal for QF and then switch to VA for whatever is left of my QF year. I'd say my main reasons for keeping QF platinum are all benefits that occur on my overseas travel rather than domestic so I'm not exactly handcuffed to Qantas while flying here. I hope this makes sense!