Hate having to download all those sounds, materials and stuff that you might never need (note: you may need them on custom maps) - simply enter one of bottom two commands above! Personally, I use "nosounds" as I find it really annoying downloading them all.cl_downloadfilter all (default is allow all files)
cl_downloadfilter nosounds (stops sounds from downloading but not maps)
cl_downloadfilter none (blocks all files)
Newbies: open up the console (enable it in keyboard controls, advanced) and type it one of the above - then talk to me about getting an Autoexec sorted!
Advanced: Open up your autoexec and copy one of them in. Be sure you run your Autoexec before you load a map.