I was one of those who wore the hospital gowns, sometimes with boxer shorts. I had some days of complications, so I wasn't very interested in what I wore. Later on, when I was re-admitted for some other complications, I wore the boxers and gown still. I just wasn't worried about it. When I got home, I was always chilled, so I wore long-sleeved sweatshirts and sweatpants. When I went out, I was able to wear jeans and a button-up shirt. For the first couple of weeks I had such fluid retention in my ankles that the only shoes I could wear were old sneakers. A few weeks of lasix took care of that.
As for food - I really had little appetite for a good 4 or 5 weeks after surgery. I lost about 15 pounds before food started tasting good again and I regained my appetite. Part of the problem was that all the meds (at surgery and post-op pain meds) made me so constipated that I couldn't eat or sleep. That's why I was re-admitted to the hospital for a few days to sort it out.
During those first 3 or 4 weeks post-op, my mind would think I wanted to do things, but I just couldn't focus on anything long enough to do it. . .
Now, at 8 weeks post-op, I wear whatever I want and eat what I normally would eat. I even had my first cocktail last evening. I've been holding off until I had a chance to discuss alcohol with my doc, due to the meds I take (warfarin, metoprolol and amiodarone). They said one would be OK, but not to try for more. I had that one, and all is well.