I married for a lot of the reasons given, plus a few more. I was looking for someone to complement me (as opposed to compliment... but that's welcome too!), someone to do the things I can't.
I've been single for a while now, and I really miss some of the little things, like the hugs and cuddles, someone to talk to, the feeling of anticipation when I hear the truck drive in.
Plus it sucks having to check the weird sounds in the middle of the night, catch the icky bugs, take the garbage out, change the oil in my car...