Should I get Junior a playmate?

I'm not sure which forum this belongs in but this one seems to be the most relevant.

I've had Junior, an 8 mo tabby, for just over a month now. On a typical work day I'm gone 9-10 hours, leaving only a hour or so in the morning and 5-6 hours in the evening for Junior. I feed him morning and evening and play with him maybe 5-10 minutes every hour.

As you can see, Junior is by himself the majority of the time except on weekends so I've been thinking of getting him a playmate. If so, what age and gender should I be looking for to maximize the chance of them getting along? I'm sure Junior already considers my place his and any cat I bring home will be an intruder as far as he's concerned. Junior has never sprayed, failed to use the litterbox, scratched up furniture, etc. If I get another cat, will I start facing these issues (as a result of the interaction or dominance between the cats, not the other cat doing these things on his own)?

Mez

I think a 2nd kitty is a great idea I'd go for a kitten of similar age to Junior, or at least a young cat with a similar activity level. I dont' think the sex really matters as there's not much difference between males and females when neutered, although I do think that generally 2 males is the easiest combination when doing introductions. But personality is more important. At 8 months old, I think Junior will have few problems accepting a newbie although there will be the usually hissing etc at first and you'll need to do introductions slowly.

I'd adopt another neutered male in similar personality - maybe 4-6 months old. They would both benefit and it would take less time for introductions.

That wouldn't work for me. Zane hates other cats, hates them. It'd be like the Cats of Kilkenney.