I use Excel and Powerpoint regularly at work. We also use Access for our databases, but I generally avoid it. We use Outlook for e-mail which I believe uses Word for formatting, generally. I also just use Word by itself from time to time. I can tolerate them all, as long as it isn't Office 2007 or later. I can use 2007+, but I don't like to, and I'm not nearly as proficient.
Formulas, whatever, I can do those. But Graphs? Don't even get me started. All the options are hidden from view and it's near impossible to get a graph to do what you want unless you've taken a fucking course in the damn program.
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Yeah, excel has some pretty crappy graphs. There are better programs for that. I only use it for basic XY plots, and even then it is pretty inferior. The curve fitting functions are terrible.