Even the lamest days I have now blow the doors off the days when I was drinking, because they're actual days -- not ugh/puke/drink/blur/passout/wake/shake/repeat.
Now of course I spent days not so bleak: Friday afternoons blissfully buzzed at happy hours with good buzzed friends. Do I miss them? Of course. I also miss some old girlfriends, college life, san diego, etc. It's less of missing the drink and more being sentimental. But it's the past, and that's OK. Most of those friends are moved and married. It's the past for them too.
Their present is great; so's mine. The reasons are different but the reality is the same: Happy.