I agree that the key for me is getting out every morning. We go to a music group and various toddler groups. I also work part-time which helps me to appreciate the time I do have with DD's.
In the afternoon I tend to do housework which they help me with or play by themselves. I also spend periods reading to them which I really enjoy, and sitting having a cup of tea with them whilst they do playdoh and drawing at the kitchen table.
I'll also often invite friends and their kids around. We're still interacting with our little ones, but get some adult company as well.
If the weathers okay, we spend ages walking outside which keeps me sane as I'm outside and we all enjoy the fresh air.
Am working today and DH has the girls and think it will be a bit of a struggle as the weather is appalling, everywhere will be packed and it'll be a long day.
I think its easier as they get older. My girls directed me the whole day yesterday as to what they wanted to do - which is great to have that interaction!
I also let them watch tv for up to an hour at lunchtime, which they look forward to as they are tired by then and recharge. And I enjoy as I get to sit and check e-mails, have a coffee in peace etc.
I agree it can be tedious, but that doesn't mean you don't love your children and enjoy their company. I think it's just the sheer repetition, it is harder to get out and about with kids and doing the same activities every day that they love makes them happy but isn't hugely exciting for the adult all the time.