if you really want a fast boot time then i suggest having two partitions. one partition with everything on it except your docs, media files etc. and then defrag the first partition with idefrag
first partition
-applications
-library
-system
-users (excluding documents movies, music, pictures folders in home folder)
second partition
-documents
-movies
-music
-pictures
the only con using this is the documents, music etc folders wont keep there folder and sidebar icons so you have to give them your own and there is a little configuring to get save locations for apps corrected.