24 and 7 - various FM tuners win out both at home and in vehicles (I have two Tandberg 3011A tuners - one for my main system and another for a six zone home system). We have a handful of good local FM stations including Jones College out of JAX FL. I simply don't want to download or buy every piece of music I enjoy - and enjoy catching them randomly on FM.
Towards evenings or off-days in a more leisurely mode, I prefer SACD, DVD-A, HDCD disks and soon, Blu-Ray Audio. After much effort and luck setting-up my system, redbooks are getting much more "air time".