i love bridge sized cards, but also use poker sized cards,
the advice is often given that you should use poker sized cards, because if you learn how to do something with them, then when someone hands you a bridge sized deck you will still be able to do it.
but if you can only do your technique with bridge cards then if someone hands you a bigger sized deck you will struggle to do it.
its the same with martial artists, they often use heavier weapons for training, and then use a lighter version for tournaments etc, because they can move a lot faster with the lighter weapon after training with the larger one.
incidentally, apparently the size of a persons punch/ technique etc becomes a lot smaller if they are scared, so if someone is actually attacked then the size of their movements reduce. which is why a lot of martial artists practice such large movement, because if they get reduced by fear, then they are at the correct size, as apposed to starting at the correct size and reducing to a size too small.
personally i think that can all apply to magic too, i know that i do my technique less effectively when I'm actually performing because i suffer from stage fright. so when i practice i try and get them better than i want them to be so that they reduce to where i want them.
with deck size, practicing with a larger (and slightly heavier) deck will improve your technique with a smaller deck.
I have friends who use the pass when they perform (i rarely use the pass and if i do i only use it at moments when i know no one could possibly see it, i've never tried to make it invisible) and they said that they used a deck with extra cards (60 - 70 in total i guess) to make the 2 half's bigger and harder to pass. then when they go back to a 52 card deck it was easier.
so basically what I'm trying to say is play around with the larger cards some more, unless you are very young (and therefore have small hands) or just happen to have very small hands, you can still palm and pass these larger cards.
if after a few months you find you really aren't enjoying using them, then go back to the cards you do enjoy using.
see the links below for where to buy bridge bikes. you can get packs of 6 and 12 from cards4magic which works out a little cheaper.
http://www.alakazam.co.uk/product-Cards-Bicycle-Bridge.htmlhttp://www.magicshop.co.uk/p3725/Cards_Bicycle_Bridge_(Red)/product_info.htmlhttp://www.cards4magic.co.uk/acatalog/copy_of_xPlain_Bicycle_Cards.html