His attitude is a factor, but not big enough factor anymore to be con that weights the balance over to a no. He will allways be bit fiery simpleminded guy, but for 2 seasons, even if its partly because Samp alllow him leeway ofcourse, but for 2 seasons he has behaved and done his talking on the pitch.
Frankly speaking, this guy is a must signing. 28-29 is non issue, his sum will be a non issue because you cant get better with same figure basically. He is quality, we dont have quality like that, hence we should sign him. Its no rocket science.