I did this too; text message tone was the TNG door chime, phone call was the TOS bridge "ping", voicemail sound was the intraship communication beep from TOS, and of course, my alarm was the TNG red alert, volume maximized for pure waking power.Daily. My ringtone is the TOS theme. My alarm is the TOS end credits theme. My SMS is the doorbell in TNG. And my office computer has a Star Trek sound theme.
Whenever I drink tea I think "tea, earl grey, hot".
Me too for my cellphone. Phone call is the ST bosun's whistle, text message is the chirps the TOS communicator makes when flipped open, email to my synched work Outlook is the "incoming message" double-beep of the communicator. timer alarm is one of the bridge scanner SFXs.
(just an aside, I have an iPhone and www.iringer.net is a great program for making your own ringtones from audio files, particularly since it requires a special file to upload correctly)