I have two males...Fergus is 4 years old, and Captain Steuben is 5 months old. Fergus is the biggest sappiest syrupiest smoochy-loving creature I have ever seen. If I so much as breathe in his direction, he gives me bedroom eyes, turns on the big loud purrs, head butts me, kisses my face, and gloms all over me. He loves to cuddle, and spoons with me all night long, he little red and white head mashed next to mine on my pillow.
Now Steuben...well, let's just say he's your typical spastic kitten. Now that he's a bit older, he'll take a break now and again, and snuggle with me, and turn on some lovey purrs. I predict he will grow into a cuddler as he matures.
Then, there's Ripley. She's kind of cranky, and has decided that she has a clear distaste for Captain Steuben. She can be very affectionate (towards me and me ONLY...she hates men, and does NOT like my husband), and has LOTS of tortitude...being the lovely tortoiseshell princess that she is. She calls the shots with lap time, and DEMANDS affection on her terms only. Now with Fergus, all I have to do is glance in his direction, and he's all over me in 0.5 seconds. Ripley is much more moody and reserved. Definitely all-girl...I love her to pieces, but she definitely determines how much affection she needs, and sometimes prefers her alone time.
My conclusion is, based on my current brood, and others I've had in the past, is that neutered males are generally more sappy and lovey-dovey than spayed females. There will always be exceptions to this rule, but my boys have always been far more needy with me, and love to be loved by me. What can I say, I'm popular with the boys.