Having just completely gutted and renovated an old house, I have a few suggestions - things that have worked well in our design and I'm happy with.
First, I agree with everyone about the electrical outlets. It's funny how much work it is to choose where you want them before you live there. Have the electrician take you on an imaginary walk-through of the house if possible, and think about where you want to turn on/off lights, and where you want bookshelves (they cover outlets!), etc.
Second, I love our porcelain kitchen sink. we always had stainless steel before and I found it looked cheap and always looked dirty. i give the porcelain sink a good once-over every few days, it takes about a minute, and it looks gorgeous. We also have wood chopping-block-style countertops. Love them. I don't mind the nicks and scrapes because to me it adds to the lived-in feel, and they are a great addition to the kitchen. Also in the kitchen, we have pull-out bottom cabinets. Nothing gets lost in the back of cupboards this way, and our heavy plates are all stored down below, rather than in the wall units.
Sounds like you got the bathroom plans all worked out, which is great. I'm sure it'll be a lovely home.
While you're still in the design phase, I can HIGHLY recommend the line of books from Sarah Susanka. She is an architect who has specialized in making homes liveable and practical, so that we use all the spaces we have and we feel good in them. Her big hit was the Not So Big House, and the two I bought are "Not So Big Solutions for Your Home", which is a series of articles that appeared in Fine Homebuilding magazine, and "Home By Design". I am very happy that I read these books before putting any plans in place, and feel that we have reached some great solutions for maintaining a wonderful space to live in and keeping our sanity...

You can check out her whole website at
www.notsobig.com
Good luck and have fun with the project!!