Bearded dragons are friendly, interactive pets. A great choice for your criteria, except three things...
1.) Their poo smells, BAD. Granted, the smell only lasts as long as it takes for you to clean it up.
2.)They have pretty decent lifespans--10-15 years. As someone mentioned before, you do have to think about college, etc in the future. Keeping up such a high-maintenance lizard can be nigh impossible on a college-life budget, even more so if you have difficulty finding a rental that even allows pets.
3.) To the contrary of what's been said here, they are NOT low maintenance animals. Though easy to care for once you're accustomed to the routine, they are extremely expensive and time-consuming animals to maintain when compared to snakes and rodents.
They need lots of space... The bare minimum enclosure size is a 40 gallon Breeder (3x1.5x1.5 feet), but you need at least a 4 ft enclosure to keep the average adult Beardie happy... My very small, not especially active male is absolutely miserable when kept in anything smaller than 75 gallons, and any beardie will enjoy much larger space than that.
They need fresh and live prey. Fresh greens and veggies daily (just preparing a salad can be quite a bit of work), and live insect prey at least every other day (adults) or even a couple times a day (babies).
Then is lighting and heating--UVB lighting is absolutely essential to the health of bearded dragons, but UVB bulbs are expensive and must be replaced regularly (every 6 mo for fluorescents, every 8-12 mo for mercury vapor). As for heat requirements, they need a basking spot of 100-110*F, a cool end in the 70s/80s, and night temps no lower than 65*F.
...And bearded dragons are one of the easiest diurnal lizards to care for.
If you're up to the challenge and expense, bearded dragons are fantastic pets. Just make sure you do all your research, as they have much more specific care and are much more prone to succumbing to improper husbandry than corn snakes or rodents are.
http://beardeddragon.org and
http://beautifuldragons.com are two excellent places to start for care info.
Now, with all of that said, I would recommend a pair of rats for your situation. They're excellent pets, don't smell TOO bad as long as you keep the cage clean (I've heard a little bit of vanilla extract in the drinking water can help the smell, too), and their lifespan is short... A couple years, maybe a little more. They'll pass away of old age before you have to worry too much about what to do with them during college.