I'm with Charles on this one. Sure I'd prefer to just have one platform, but I've had very few issues with Origin.
I just had to install Arc as well, to download Star Trek online (haven't played it yet, but hubby tells me it's much better now than it was at launch). :-)
The only platform I've had major
issues with was Games for Windows Live. I vowed to never again buy a GFWL game after the trouble I had trying to play Fable III.