i think "hydros" (to continue with the aussie slang) has a bad reputation amongst some folks because they're used to smoking commercially-grown black market weed that is often not properly flushed, harvested early, and grown simply for profit by organised crime outfits. this "bikie weed" is grown for rapid harvest, and maximum weight/quantity in minimal time - not quality.
having said that, i know some people that prefer lower quality "bush bud" or outdoor homegrown - but most of the time these people don't smoke much, have low tolerance and/or tendency towards anxiety when they smoke stronger cannabis.
in my experience though, good quality outdoor weed is as good as - and difficult to distinguish from - hydroponic stuff.
my understanding (which is admittedly limited; i'm not grower) is that genetics play a much larger role than the hydro/bushies designations give credit for.
i've had great bush weed, and very very shit stuff as well.
the same goes for hydroponic weed.
personally, i like my weed strong, but i have a very high tolerance.
if you don't have much of a tolerance, potent weed can be far too intense.