The academics at Pitt are extremely varied, which is good because it means there's something for everyone's preferences. A lot of the intro classes are several hundred people (the biggest being 300-400), so it's easy to get lost in them (which, in classes you don't really care about and want to be able to skip without being docked attendance points, this is great). A lot of the upper-level classes within majors are smaller and more intimate, around 20 or 30 students, and in this case the professor will know your name. This is generally a good thing though, because in your major, you usually want the opportunity to be more engaged.
My favorite class was Intro to Poetry Writing, which isn't even close to either of my majors. As a freshman science major it was the first small class I had ever had, so I liked that, and also my professor was really young, cool, and understanding. He listened to the interests of the class, which helped us decide what to read, and made assignments really flexible so that we could tailor them to our individual interests.
Though the typical Pitt student might be stereotyped as lazy in regards to homework, most Pitt students are actually pretty intellectual, and random intellectual conversation is, while not prevalent, definitely not out of the ordinary. I've walked by students sitting around randomly debating nuclear energy, and one of my friends met his current girlfriend because they got to talking about social issues in society today at an otherwise typical twenty-first birthday party.
One great thing about the Pitt student's laid-back attitude is that most students aren't competitive academically. The one glaring exception to this is pre-med students, and if you're taking what's considered a weed-out class for pre-med students (intro biology or organic chemistry) and you are not pre-med, it will be an awful experience because you literally won't be able to get an A without giving up 30 hours a week to the library.
The school's liberal arts and academic requirements are relatively easy and painless, especially if you're coming in with some AP credits. The "global" requirements are a bit hefty if you don't study abroad, but just the mere act of studying abroad (regardless of the classes you take abroad) will knock out anywhere from 2-3 of them.
Most of the professors at Pitt are pretty approachable, friendly, and willing to see you outside of class (I've had a few in the hard sciences which aren't very approachable though). I've definitely gotten the opportunity to get really close to a couple professors, one of whom serves as essentially a mentor to me, and I've even been to his house and met his wife and children. In most cases professors are willing to talk to and establish relationships with students, but usually this is something the student must initiate.
The education at this school isn't really geared toward getting a job for the most part - we have a strong liberal arts program, and the second best philosophy program in the nation (and philosophy majors are notorious for not having jobs when they graduate). That being said, the engineering school and any pre-professional track (pharmacy, med, dental) are clearly geared toward getting you a job/into the relevant professional schools.