Agreed that wraps are nothing special, but really, they do travel well and seem to hold up better
than a sandwich. I like mixing mayonnaise with a chipotle pepper in adobo sauce, and having it available in the refer to make a wrap. I have found it is better to put the mayo, mustard, ketchup, if you use it on top of the meat, rather than between the wrap and the meat. The filling does not slip and slide, and the condiment does not ooze out as much. Tomatoes can be a bit tricky, and I don't use them unless they are in season,then I opt for the firmer textured ones, such as plum.
I love: beef/horseradish/swiss
chicken/mayo with the chipotle in adobo
pastrami/mustard/dill pickle
turkey/cranberry horseradish sauce
tuna salad/swiss
I put lettuce in all my wraps, and tomatoes during the summer