I have used loads and loads while nannying.
Have LOVED many (and have some for my own) and have hated others with a passion to the point where i wont even let myself be given them as spares!
Mothercare smart is one of my hates as are bambino mio and cotton bottoms (all 'prefolds)
already i have ove 50 cloth nappies for 1st size
... and that is far far far more than i need.... but have bought and been given a few by friends etc, and some myself, and then i just have to have those too.
My favourite type of nappy is a shaped nappy with a wrap.
I think Motherease airflow is well known to be one of the best most 'bomb proof' wraps, but the ricki is almsot as good, and some will argue better when they are tiny.
I have some newborn Sandys (I LOVE Sandys, have used them lots)
some small Sandys (from 9lb so maybe from birth)
some little lambs
some lollipop softees (SOOOOO cute)
some fleece lollipops
some MEOS... i doubt ill use these when baby is tiny or more than 15 months ish depending on size / shape of my child... (these arnt my favourite nappy but ok as a spare / to keep in car / change bag / at MILs etc)
a cotton tots bots
I have got a FREE Bumgenius (birth to potty pocket)
and a FREE Popin (when they were new about 2 years ago i found a link for a free sample and kept it)
(thats makes over 50 nappies) 
I havent got any newborn kissaluvs but they are a lovely nappy, probably the cutest / best newborn nappy
I also was given some terry squares (useful to mop up sick and for nappy free time so i accepted them) and i have some nappy nippers... anyway just for fun have been practising folding terry squares (I like bat fold) and might use some of them as well, just cause i can, but then that means i have about 75 cloth nappies 
Id like some tots bamboozles but think i need to wait for size 2 to be allowed to buy anymore.
I have a couple of completely free packs of huggies newborn disposable nappies, and some individual pampers / nature baby samples, which i might use, if i have to go to hospital.
Am hoping for a home birth though in which case baby will be in cloth from hour one!
I figure although so many is rediculouse, and will be doing lots of washing anyway in the early days, i wont feel pressure to wash now due to fear of running out! I plan to line / air dry, so doesnt matter if its raining and they take a while on the airer.
and once i see how many are really really spare will sell some on again!