Some levels in CCLP3 were just outright over-powered in my opinion, which caused me to lose my motivation toward the end of the set. Same Game, Recurring Dream, Suspended Animation, Rotation, Vulcan, and Old Frog New Tricks (somewhat) were examples of this, where the difficulty was unnecessarily high and could have been a lot easier and thus more fun. YCaOFNT seems to be more of a form of art though that had never been used so well before, which may seem crazy but it still explains why I love it so much.
On the other hand, levels such as We'll Be Right Back, YAYAP, Mudpie, and LUNiT are difficult in a much more natural way, in that they are difficult puzzles without so many "catches" involved just to make it harder (except for LUNiT but this was a whole different concept).
I'm not trying to argue against anyone's opinion here, I'm just adding my own opinion.
On the other hand, levels such as We'll Be Right Back, YAYAP, Mudpie, and LUNiT are difficult in a much more natural way, in that they are difficult puzzles without so many "catches" involved just to make it harder (except for LUNiT but this was a whole different concept).
I'm not trying to argue against anyone's opinion here, I'm just adding my own opinion.