I like paper charts but I am stuck in the middle of the country so I have to buy two. Not that I every fly abroad but I really think all maps within EASA countries should be the same format.
This year I am going to buy the Cartobossy 1:million chart which covers all the UK. I can then get the same format chart to cover some of the european countries.
In reality of course I will use skydemon but use these as a back up.
I suspect that I will still recommend my students to use the CAA 1:500K chart however.