I use the king of patches - the elusive
Rema Tip Top F0
I recently had a rash of valve stem separations which has led me to carry 2 tubes - one in the jersey and one in the saddle bag
If you need more than 2 tubes then it's probably raining and you'll never do a decent patch job by the side of the road anyway. I guess this is a good enough excuse for using glueless patches for roadside repairs, but even so I still use Rema
The guy I ride with used to use glueless patches, but now he just carries 2 tubes like me. They seem to hold a whole CO2 cartridge no problem. They also seem to go all crinkly and start to separate after a while. He never used to care though, he just slung them out and got another tube.
I've never had a Rema patch let go whilst riding, although if you leave the tube rolled up in your saddle bag for long enough they tend to perish on the folds
boris