Well, I'm certainly no expert myself. Each time I fired up Randy I failed miserably :-). I haven't played enough of the others so I can't really say anything about them. I think I'll give Cassandra a go and see for myself how does that feel like.
No pop cap is not the reason for Randy to me. I like the unpredictability and occasional (well... more than occasional :-) ) chaotic mess. You need to be wary all the time. And so far it was far from being "fair" or "middle difficulty". It was actually really challenging. Again I don't know how does it compare to the others but I wouldn't call it "mediocre" :-).
No pop cap is not the reason for Randy to me. I like the unpredictability and occasional (well... more than occasional :-) ) chaotic mess. You need to be wary all the time. And so far it was far from being "fair" or "middle difficulty". It was actually really challenging. Again I don't know how does it compare to the others but I wouldn't call it "mediocre" :-).