I don't think there is any one right answer for everybody. You need to think about your camping style: what's important to you, the types of trips you enjoy, what you bring with you, the range of trip lengths you want to plan for, and so on. Tough to do as a novice camper, but I think there are positives and negatives of both types of trailer. In the end though, I think the key tradeoff is sleeping comfort vs. storage strategy.
The teardrop is probably better if you place a very high priority on coming as close as possible to replicating the comfort of your bed at home. They will accommodate a very thick mattress, and you don't have to deal with the noise of a tent flapping in the wind. You also don't have to deal with the inconvenience of clambering up and down a ladder to get in your RTT. You can work on the comfort level of an RTT - many people supplement the RTT mattress with various inflatable mattress options for example - but at the end of the day it probably is not going to be as comfortable as what you can do with a teardrop.
On the other hand, the primary storage area for large & bulky items in a teardrop is on top of your bed. True, many have roof racks, and that can work, but depending on what you plan to carry up there you may need to consider the need for weatherproofing, security, and ease of access. If you need to empty the trailer of items stored on top of your bed that can negate some of the ease of camp setup advantage of a teardrop. Such items also need to be packed so they can survive time outside in the weather. Camping tends to go along with items that become dirty & grungy (firewood, grills, etc). Where will you carry that stuff? One of the advantages of a trailer such as the Horizon from Adventure Trailers is that there is a ton of storage area inside the trailer that is weather proof, secure, and doesn't need to be touched before you go to bed.
BTW, we have an AT Horizon, and we love it.
