I just play a right-handed guitar 'upside-down'. While this makes it harder to finger many chords as I need to reach over the lower strings to reach the higher

I just play a right-handed guitar 'upside-down'. While this makes it harder to finger many chords as I need to reach over the lower strings to reach the higher ones it makes it easier to just pick up any guitar I come across. I learnt it this way because of the way I learnt to play guitar, by picking up one of such and starting to play it - little did I know I did it 'wrong'.