*raises hand*
i use the logging function on my meter all the time. i can hook it up to a chassis B+ and leave it for a few hours and then get a max, average, and lowest reading. gives me an idea if the voltage needs to be tweaked or if there is something wrong. same with line voltage... if there is an issue with computer freezing and basic hardware checks okay, i can log the voltages and see if the dip when it crashes or reboots. it's a great feature.
diode test, resistance, current, continuity, ac/dc volts...obviously I mean I have them, so I use them. capacitance test, not so much, as I have an ESR meter...same with the temperature probe.. i have a non-contact infrared unit i use for quick checks. but i have used it a few times.
about the only one I don't really use is the frequency and the duty cycle measuring of AC motors... I have used the frequency along with an SPL meter when setting up subwoofers to find the natural resonant frequency of the setup but if I was testing AC motors i'd probably use them for their intended purpose.

in the past i have had the more expensive radioshack branded meter and for what it cost, it wasn't bad (i think about $100) but mainly i needed more range. sometimes 500 volts isn't enough. which is why i went to fluke in the first place since it has a 1000 volt range. before that i bought several 10 and 20 buck units and just had nothing but issues. accuracy is way off, no range, cheap leads.
side story:
one of the places i worked at about 10 years ago had a fluke 867 with the built in o-scope... man, when that place went bankrupt, i wish i couldda got my hands on that meter... that was probably a $3000 meter in it's day. hell, on ebay they still go for a grand.