I enjoy using knoppix it is so easy to start with and powerful enough, it has become my favourite distro since I switched from M$, but I wonder why knoppix keep expanding itself so much that no longer fit into a single CD, and there are duplicated tools of the same kind, I've to manually remove them to reduce space in order to use in an old and underpowered PC. I also like DSL it's lighting fast and eat less system resources, I used to keep a liveCD in my wallet, I wished it has some more powerful apps but then it will not fit in a 50M disc, I think 200M is about right and still fit in the wallet.