I think it is different for everyone...
I have had no end of trouble with my tank, i.e had huge ammonia spikes, intestinal worms and some other un-diagnosed problems yet the dwarf gouramis have survived the lot!
I am now on my 2nd pair of rams, the first lot were given pristine water conditions and were fussed over constantly but died regardless while the latest pair have be put into a 'mostly' cycled tank, survived a heater breaking which partially cooked them, then froze them, resulting in a white spot breakout. Yet they have now coloured up to breed, who knows???
Neons can be short lived and contract white spot in poor water conditions but they are fairly cheap to replace if one or two die.
Its all about trying them for yourself.
(p.s I can't keep platties alive... a so called beginners fish..)