I have never put my stickers on my stamps, call it pure laziness I think!! But I do think they stick better without the stickers. Some people put a THIN coat of Aleene's Tack It Over and OVer on them and they stick well afterwards.
I know if a stamp is real small, some people prefer the wood mount ones. I used tiny tags the other day and never had an issue with them on my clear blocks, even the little BOO! stamp which is TINY!!!!
If you are having problems with your stamps bending or creasing, contact your demo, they may be able to help you with those!!!