'Nothing' wrong? There are known problems with every single vehicle made, and of course some problems are more serious than others. The lengthy process of designing, sourcing, manufacturing, testing, refining, redesigning, distributing, and so on for each vehicle model is so madly complex in the macroscopic sense that it's almost insane to believe that any model will be 100% each and every time out of the line and under whatever uses/abuses/environments await them in the wild. Hopefully the OP doesn't run into anything major, and the dealer takes good care of him.
As for GM .. Depends on the model, GM makes a lot (too many imho). Some are fantastic (Malibu, Full-Size Trucks), some are obsolete/outclassed/uncompetitive (Cobalt, Aveo, Impala). Still, GM has massively improved from the trash that dominated most of the 80s and 90s, and while I would take a Civic over a Cobalt, I'd consider the Malibu and Accord to be pretty much equally solid good cars.
Also, you can't glob all German models into one group. Some are more reliable than others. Of course a lot of the buyers of the upper-tier models couldn't give a shit if the car is falling apart and a money pit after 50k miles, because they're the type of people who lease a car for a year and toss it aside for the new one every year or two. Short-term I wouldn't mind a BMW or Mercedes for a DD (don't care for VW/Audi personally), matter of fact I would love it, but long-term I couldn't do it. I am looking forward to picking up another M car as a weekender though at some point, which will probably be driven less than 5k miles a year.