For me... wayyyy too much. I run my own website, which I work on a lot. I also work for a friend of mine, so I work on her website and write for it quite a bit (probably more than on my own). I recently finished her redesign and the redesign of her mom's website, which took some time. Now I'm looking for other work from home type positions.

Needless to say, I spend most of my time on my computer... I'm a geek!

I need to set up some sort of schedule because everything related to my site is getting pushed behind everything else...

I need a vacation!

My computer is my work Although I'm still waiting on pay for a whole lot of work I've done lately on a website...

All this work in the past 6 months or so and I've made not even a week's worth of paycheck.

I work from home, and have two computers, so, unless I'm sleeping or showering, I am pretty much in front of the computer. But I do try to take one day a week off, and only check email from my phone on those days.

I spend half of my day online. When I'm at home, I am in front of the PC.
Just give a break to go to the university 
 

I think that I spend  about 4 to 5 hours a day  online. But I like to write contents for the different sites and I think seriously about creating eBooks.

I spend a vast amount of time online. Between the different communities I'm part of on a personnel basis, and then those I join for promoting my own, I hardly have any time offline.

Then take that vacation, dear! You sound like you need it!

I spend most of my day online, too, due to a combination of work, school, and chronic illness. So I wouldn't worry about it being "too much."

I'm on like 8 days a week. 
Since I am working from home (and also a computer addict), I spend all my time in front of my computer. I was even thinking lately that when i was working a regular job, all my previous bosses were nicer than I am now as my own boss. I never give myself free time.