We always take Disney slow, but we are fortunate to be able to go often. We usually wake up when we want, grab breakfast, then venture to the parks and do a few rides, come back to the hotel and lounge around, go to the pool, go back to the room and nap, get ready and go to dinner, have drinks or go back in a park etc. We could never stay in a park all day from open to close, we'd go nuts! lol You can definitely be relaxed and still enjoy Disney! I think you can definitely do it if you go for long enough so that you can still do everything, just at a slower pace! You can also schedule a few nice dinners, so that you can lounge at the hotel all day, maybe rent a cabana at the pool, then take your time getting ready for your nice dinner, and make it very romantic!
We love going the last week of September/first week of October- end of Sept isn't too crowded and then F&W starts in October!