After having (and still owning!) 3 1970 musclecars, I endured 14 years of driving minivans due to having kids. When it came time for another daily driver vehicle, I looked VERY HARD for a safe, large family car that had the zip and FUN akin to my old musclecars. I found the Impala. Ok, it does not turn as many heads as my 1970 lime green big block 'Cuda, but it is alot of fun to drive and always gets great comments from people who ride in it -- especially my Volvo S80 and Saab and Passat owning friends who can't believe how little my Impala cost. I will buy another Impala next year when my oldest kids take this one over.
Style (especially those tail-lights!). Safety ratings (look at www.nhtsa.com). Front-wheel drive handling in snow.
Make an SS version with a turbo (like Buick has). Offer the better Bose sound system that a Buick offers.