Rizzo still pees about every 2 hours, though sometimes he'll go as long as 4 before needing to go out. Riz never marked before or after (cross fingers) and I waited until he was almost 10 months old to have him neutered (he still squats like a girl, lol)
The only time I've ever seen his "lipstick" was the day after surgery, and I haven't seen it since. I think it all depends on the dog, and Rizzo is pretty laid back when it comes to masculine behaviors...he's a great pup
Personality wise...I can't think of anything that changed, he seems a little more brave than he used to, but he is still a huge wimp.