1.) Good schools - If you are interested in engineering and many of the sciences, there are few places better to go than Penn State. The school has one of the best os the US engineering programs and, in fact, more working engineers are hired from Penn State than any other university in the country. Academics are amazing, with professors from all across the globe. As far as engineering and science education goes, you almost have to go to an Ivy league institution to beat Penn State.
2.) Fun - As I've said before, Penn State students work hard, but we also know how to have a good time. As one of the country's top party schools, you can find a party either on campus, or just off campus nearly every night of the semester. Not everyone enjoys this kind of environment, but for those that do, Penn State is a paradise.
3.) Opportunities - There are so many different opportunities available to the students at Penn State, opportunities that other schools, particularly smaller ones, may not be able to offer. There are a multitude of study abroad options. There are dozens externship and internship opportunities. Research is abundant in all fields of study, for grad students and undergrads alike. I and at least six of my closest friends all have research positions as freshman. I'm going abroad to Shanghai this summer with some other students form my college to take classes and conduct research at Fudan University. One of the girl's I'm going with also has an externship position shadowing an optical surgeon at Johns Hopkins for a week in June. One is planning to spend his entire junior year working and studying in Germany. Another student in my major is going to be paid to assist with cancer research this summer at Mayo clinic. The possibilities here are endless. With the help from places like the University fellowship office and the school's good name and reputation to back you up, the possibilities are endless.