XP seems to have fatally crashed. R.I.P. I was able to save my documents and replace the blanks in filenames with underscores.
I've always used gnumeric natively, but I see on import that it doesn't recognize Arial font, even though I have it installed and I can reset the font to Arial (on each and every sheet), but tables and graphs look different from Ms Excel. Dates are also not recognized and display as numbers (seconds since epoch?) , and graphs are square instead of rectangular with lots of whitespace on the sides.
I installed Libreoffice-bin and it took a very long time to emerge because, although it's a binary package, it depends on 49 packages that I didn't have installed. I read that Libreoffice from source takes most of a day to build. Still, Libreoffice looked much more like Excel and recognized the Arial font and dates. However, neither displays wide graphs and Libreoffice took a better part of a minute to load. Apparently the whole suite loads before you can select "Calc", which is the Libreoffice equivalent of gnumeric. So I'm asking what do other Gentoo users prefer.
I invite comments, but even if you don't feel like commenting, please vote in poll, but only if you actually use a spreadsheet program under Gentoo.

EDIT: I didn't include Apache Openoffice because of license and also generally negative comments from DuckDuckGo