I have been partially derailed by Animal Crossing and Crimson Shroud recently (as you can tell, I take my time getting to games) but I'm still chugging through DKCR3D. Part of the reason for the divide in my attention is that I have finally hit a bit of a wall in terms of difficult.
Now, to be totally clear, it's not like I was ever breezing through this game. It has always been challenging. I guess it's probably more accurate to say that I have hit a point where challenge is outweighed by frustration.
Two levels are responsible for this: Blast & Bounce (5-K) and Bobbing Basalt (8-5). I have spent something like an hour on Blast & Bounce which, by video game standards, is not that much time, but it definitely crosses the threshold of the amount of time I want to dedicate to one of these levels before I can beat it. The main cause of frustration is that there are no checkpoints in the K levels, so I never feel like I'm making progress. Also, every second of it is brutally hard so you can continually die at the very start, even if you've played it 50 times already. Bobbing Basalt probably isn't as bad, but I came to that after hitting my head against the wall on Blast & Bounce and I couldn't make it through.
Oh well, I will probably beat these levels eventually. In the absence of forward progress, I have continued to go back through the game to get puzzle pieces that I had missed and it is at least gratifying to be able to blast through the earlier levels with ease.