I've also studied them in classes (admittedly long ago), and had them crammed down my throat by well-meaning believers. "Just read this, it explains everything LOGICALLY and you WILL believe!"
Pfft. Along with Aquinas, the two most often recommended were Augustine, who was advertised as "reconciling faith with reason." And that absolutely no-god-awful, simpering, condescending jackass, C.-fucking-S. Lewis and his Trilemma nonsense.
For me, Augustine goes right out the window just for the concept of Original Sin. Anyone who could seriously propose that gross insult to human intelligence is not going to say much of anything I care to hear.
A bishop wrote Augustine a letter after reading that stuff. He said the whole idea of Original Sin was not only un-Christian but inhuman, and questioned Augustine's sanity for coming up with it. He wasn't the only critic, either. But the Church immediately recognized it as a great marketing tool, so it's still with us.
Likewise, for me Lewis instantly falls apart with the "Trilemma." Expressed as "Jesus had to be either Lord, liar, or lunatic." Well, he could have been a lot of other things, including a collage of umpteen different holy men meandering around Judea at the time. Again, that "Trilemma" concept alone is so cosmically goofy that it invalidates anything else Lewis has to say.
Bonus Philosophy Rant - I read this when I was living in Alexandria, Egypt, and I think it came from E.M. Forster, but I'd have to check.
According to the story, the Jewish philosopher Philo occasionally wandered over to the Library of Alexandria and debated with the resident scholars there.
Philo liked to talk about his little tribal god, but he was constantly being embarassed when the scholars asked him real-life, down-to-earth questions about his religion.
Eventually, Philo realized he had to come up with some new, even more incomprehensible but hi-falutin' concept to explain his Gawd. He came up with the idea of the "Mediating Logos," which makes no more sense today than it did back then.
But again, the Xians saw his ravings as useful. Anyone who wants to beat their brain against Philo can go here:
http://www.socinian.org/philo.html