I don't mind reliable old Excel, but Word 2007 is a bit of an unnecessary faff to me, and Powerpoint's as dull and prescriptive as it always been - too many presentations look the same and immediately provoke Powerpoint boredom. Hate working in it - it's a dog that levels everything into reassuring dullness
To be honest, I can't say much for the competition either. Open Office ain't that much fun to use and Apple's iwork equivalents were lightweight (Pages and Numbers) but apparently have improved. The one revelation is Keynote - presentation software that knocks 7 bells out of Powerpoint and just looks immeasurably better.
Outside of that, I can't say I ever particularly enjoyed working with Cognos software (Impromptu, PowerPlay), but even they were fun compared to SPSS and early versions of Crystal reports