I think all motherboard makers have problems with some of the batches they produce, and some of the hardware components wear out over time (especially capacitors), but over the years I've had good experience with MBs from Asus/Gigabyte/Asrock.
The Asus MB in my sig has been a flawless overclocker for the last 3 years (knock on wood).
If I had to choose another socket 1155 non-Asus overclocker board, the Gigabyte G1 Sniper line and the Asrock Extreme were the other ones I considered and had good reviews, so I would recommend you also check those out, assuming you overclock.
PS. I just remembered that Asrock was supposedly a sub company of Asus, so maybe if you want to avoid Asus you should avoid Asrock.