My only experiences with HP are good. That is, calculators from HP48GX to the HP49 line ;). Best calculators ever :P.
The scandals that happened (pretexting, spying and whatnots) have little to do with the engineers. However you're right, HP and Compaq (now merged, that can be only worse) always tried to make their memory incompatible, and their hardware seem pretty cheap (then again, nowadays most hardware is). The problem with HP is that they lack a vision, they don't "Invent". Mainly because it's a management/marketing driven company. So I wouldn't mind having HP "on my side" the day they ditch all the white-collars and have a CEO with a vision. HP's CEOs, including the current one, really suck.
On the other hand, HP is the largest technology vendor in terms of sales (before Dell), and thus probably first Windows vendor. They could hurt Microsoft badly if they made the move :).