I definately think this all depends on your usage. For me a TT is perfect because I can still use the bed of my truck to put my motorcycle, firewoods, tools and I need the space in the trailer for the family (wife, daughter, and 75 lb Siberian Husky).
Bad340 - I don't know what that persons reason was for the gooseneck/truck camper but I was considering a like setup. I wanted the truck camper to be able to load it in the back of the truck to go camping in out of the way areas. But I also used to tow my wife's Jeep to the sand dunes to play. Because of the low carrying capacity of my 2500 I was going get a gooseneck trailer long enough to be able to put the truck camper on the front of it and carry the jeep behind it and still stay within my weight limits. That idea went out the door because we are selling the Jeep (the Dodge is more fun on the dunes) and decided we needed more space than a truck camper would allow.