I've been following this thread at work, just haven't had time to join in.
Mith, I don't think you are asking for too much, you need some time to yourself. That is not being selfish we all need time alone. It's what makes us individuals and helps us grow personally and or professionally.
However I do agree with lots of others, you and your wife need counseling, it seems to me communication and compromise is the issue here! What if any hobby does your wife have and when does she have time for it? Could you possibly schedule your hobbies at a certain time or day?
My husband and I work for the same company at different locations but we carpool to and from work and we have lunch together 2 to 3 days a week. We enjoy each others company and respect the others opinion at work and home (did I mention we are in the same filed) that helps.
But every once in a while he goes into our home office or the garage to do whatever and I do my own thing. When he's ready he joins me or I ask if it's okay for me to hang out with him.
When you marry someone you do so with the intention that they will in a nutshell compensate or compliment your personality and I don't see how being demanding or destroying things can compliment anyone! It took me one 5 year marriage, two kids later and a NASTY 4 yr custody battle to understand and appreciate others opinion even if I don't like it. I do not wish Divorce upon even my worst enemy if you think what you are going thru is emotionally draining ...Divorce can be worse. Go to counseling on your own as others have suggested and if after you try to find a way to work it out your GUT tells you different then end the DRAMA and move on!
Best Wishes..