I bought a bunch of slabbed Lincoln wheat cents when I got back into coin collecting last year, but, partly influenced by y'all, I have decided that I like raw coins better.
Buying slabbed coins started to feel like I was an 'investor', not a coin collector. That's simply my self-perception, I don't make that assumption about others.
Plus, I suspect that all currently slabbed coins will eventually need to be re-graded when computer-grading takes over. By 'need' I mean that over time people will start to doubt the accuracy of human-graded coins and they will want the computer-grade.
~ Mark