When I have the car parked and the ignition off...there seems to be a little play when I turn the steering wheel. Anything to be concerned about?

Also seem slike everytime i bring the car back intot o get serviced they have to tightened something on the suspension o remove a "clunking" sound. Might be just tighening of the ball joints but how come everytime i get the car serviced? After a service the car feels nice and tight but after awhile it feels loose again.

Any ideas?