I love every class I take at UNH. My major allows me to pick and choose several things I enjoy learning about. People who are in the nursing major, or other strict fields will have less freedom in the classes they choose, but as a liberal arts student I have the opportunity to chose what I think is best for me. There are a lot of diverse things to study at UNH, and many entry-level classes so you can test the water.
I have found that most of my classes automatically harbor class participation. For instance, my sign language class would be entirely unsuccessful if there were no students willing to participate. The same goes for my writing fiction class, and film study class. The bigger lectures are usually an eclectic mix of people and there is limited participation in those courses. They implement "clickers," which are small devices the professors assign so students can participate electronically. They are also used for in-class quizzes. In my experiences professors like using them to take class polls and see how divided the class is on certain issues.
I've visited friends at many schools, and honestly, UNH lacks in intellectual conversations outside of class. I suppose if you are a philosophy major it would happen more, but in my experience, it's not as common as I'd like it to be. However, topics like literature and politics usually get people amped up to talk for long periods of time. Literature classes are the best for intense discussions.
Most professors will take the time to get to know you, unless it's a 200+ student lecture class. I like that most of my professors seem to care, and they are really intelligent people to get to know. I've had really great conversations with professors outside the class. Don't forget that your teachers are people, too.
I took a class at UNH that was very unique, even for the liberal arts department. It was a class all about dreams, how to interpret them, and what they may mean for us. We learned a lot about dreams, and ourselves, while growing creatively as well. We wrote poetry, drew pictures, and had dialogues with our inner critics. We were also required to buy a plant and keep it alive for at least the semester. The best part of the class is that one a week we had a gift swap. Students had to bring hand-made gifts and explain why they wanted to make it. They would give it to another student, and hopfully brighten their day, or inspire them. It was a really unique experience, unlike anything else I've done in school.
UNH also offers a lot of opportunity for Study Abroad. You could go nearly any place in the world and get credit for it. And if UNH doesn't already offer a program for that country or culture, you can make one for yourself and get it approved by the university. UNH wants you to make the most of your education. After all, you are paying for it.