That is the one thing about the tree that I hate, stringing the lights. DH used to do it when we first got a tree, but he didn't do it the way I wanted! He would put all the lights on the outer edge of the tree, so the wires would be obvious, and he'd go right from the end of one branch to the end of another.
So after letting it drive me nuts the first year, I've done it since then. I place the lights to hide the wire as much as possible, and place them all along the branch so the tree has some 'depth' to it, if you know what I mean.
I love seeing ornaments my mom gave me from my childhood, ornaments DH's mom gave him from his childhood, and ornaments we've bought through our marriage. We used to have a tradition of getting a new ornament every year, but we wound up with so many ornaments that we now can't fit them all on the tree.