My boyfriend and I used only condoms for about a year, and we tried basically every kind of Trojans. We liked the regular lubed ones (they came in a blue box), because the ultra-thins were slightly smaller and uncomfortable on his penis. I REALLY liked the "her pleasure" ones (in a purple box!), but other than that none of the fancy ribbed/studded/oddly shaped/scented/warming condoms felt any different than the normal ones.

We never had any breaks/scares, and we used about 4 36-ct. boxes (plus a 3-ct and a couple of 12-ct boxes! hah). We were pretty careful about putting them on, changing them if they got a little dry, using lube with them, etc.