Jacob Da Jew recently wrote a post about how his brother-in-law recently joined the workforce, and now truly appreciates the "rest" you take on Shabbos.
For me, it was the opposite. I wasn't Shabbos observant until about 2-3 years ago (I never did mark down the exact day I started). Before that, I couldn't figure out how people could observe Shabbos. After working all week, I eagerly awaited the weekend to do all the other things that needed doing. Shopping, going out, having fun, taking rides, etc.
When I married my observant wife, she said she accepted me as I was, and would not change me to try to make me Shomer Shabbos, kosher, etc. And for the first year or so, that's what it was. In fact I used to teach motorcycle classes once a month over the whole weekend. But something happened. I began to miss the Friday night Shabbos dinner. Eventually I made arrangements so I could be home on Friday night, but still teach Saturday and Sunday. But then something else happened. Now I was missing going to Shul! Huh? Where did this come from? I used to only go to Friday night services a few times a year. Now I'm disappointed that I'm not at services on Shabbos? Hmmmmm. Okay, so now I don't teach on the weekends anymore. But still, gotta have my e-mail! I check it several times an hour when awake! Well, hmmm, I guess I really don't get all that much email on Saturday. Maybe I don't need to check that often. You know what, I don't need to check at all. Let's just turn the computer off before we light the candles. Give the hard drive a rest from its constant spinning.
Boy, this is really going to be boring. For over 24 hours, no TV, no computer, no driving around and shopping. What the heck will we do anyway? Well, Shabbos dinner on Friday night is nice. Good family time. Saturday morning I get the kids up and let my wife sleep in a little bit. Then when she's up (maybe with a little nudging from me) I go to shul (the wife and kids will join me later) and I really enjoy davening there. In the afternoon, I play with the kids, or they go to a neighbor's house and run around wild there, and I get to take something I haven't taken since Kindergarten... a nice nap. Some dinner, then if Shabbos ends early enough, Havdalah for the whole family, otherwise we put the kids to bed, and a little private time to talk with my wife before Shabbos ends.
You know what? I like this! I don't miss the Saturday hullabaloo I used to participate in. It's nice to get a rest in, take a break from the average week. I've turned 180 degrees, now instead of being annoyed with Shabbos "interfering" with my schedule, I actually look forward to it and the break it gives me every week.