When I first bought my dive watch several years ago (Citizen Hyper Aqualand) I sprung for the computer transfer cable assembly and found the (for the version I had) null-modem to serial cable adaptor to do the computer transfer. Did it for maybe my first 10 dives after my AOW cert, and then just stopped...the logging software wasn't that great, although you could see the graphs of depth and temp vs. time, it really didn't "tell" me anything useful. When I got my dive computer later, I just didn't bother with the cable and downloading. I just make sure to do the paper logs each day, preferrably right after the dives (or at least scribble a couple reminder notes and detail them out at the end of the day). The computer shows an ascent rate icon that I can use to determine if I think I popped up fast during any part of the ascent, etc.
Personally I don't really feel the need to log profiles in a computer at all, and since I don't know of any computers that will log less than like 15 to 20 dives, the only reason to get that far behind in transferring the log over to at least a paper record is just plain laziness. Of course if you do want the full profiles, and are diving more than the record will hold in a single trip, then I see you would need a laptop not just a HD type device. And if I were going beyond simple recreational 130fsw and shallower diving, with simple Nitrox or air, then I'd definitely want to be logging everything!
