yeah I've noticed if I'm not right on top of oil changes at 3k miles then the tick gets really bad. First time I was convinced the motor was toast, but a few hundred miles after that oil change and it was running quieter than ever. seems like every change it gets better and better.If its a 3.2L SOHC then the valve tick is common, as I'm sure you know. Its due to varnish building up on the top of the lifters. How I always used to take care of it was by running an oil with diesel detergent in it (like Rotela T6). Tick would away within a few miles after the oil change. When the tick would come back, generally six months would have gone by and it was time for another oil change.
You can also run Seafoam in the oil maybe every other change, that helps clean up the lifters too.