I'd say skip the preglued ones and just use the vulcanizing ones. Seriously, it takes trivially longer to put on the vulcanizing patch - the glue dries in less than 30 seconds, for real, and you get a PERMANENT, reliable fix. It will take far longer for you to check your tire for the puncture shard than it will to apply and have the glue dry.

Unfortunately, I've found that on the road, the biggest deterrent by far to using patches (as awesome as they are), is finding that pinhole puncture on the road. It can be incredibly frustrating to do so without a real pump to get the air into the tube with enough volume to find the puncture. This is why I never patch on road, and only do it at home. (I do still carry a patch kit for worst of luck days, but even on a day where I did need it and had 2 flats, it took me nearly 20 minutes to find the friggin' hole. I would have called for a ride but wife was out at work that day. Totally sucked.)