I enjoy both.
I love games like S.T.A.L.K.E.R.: Shadow of Chernobyl, where even on Very Easy difficulty (what I play on, don't laugh), it's hard as hell. Guns are still inaccurate, enemies are still snipers that were trained from age five to hit their target 100% of the time, you can still only take a handful of bullets, but damn, is it fun.
On the other hand, I also adore games like DJ Hero 2, which in all honestly, was easy. I 5-starred Galvanize on Expert difficulty on my third or so try without a Power Deck, and no other song in Empire mode took more than two tries to 5-star on Expert. Maybe this was because I played its predecessor to death, getting almost every achievement (including the much more difficult task of 5-starring every song on Expert) and mastering the game, but I still thought DJ Hero 2 was tons of fun. The music was top-notch, minus a few songs (damn you, M.I.A. and all your music), and for the most part the online play is better than ever.