I still buy retail games as well. The main reasons for that are two: first, my internet connection isn't that good, which means that I find it more convenient to put the CD/DVD into the drive and install a game that way rather than having to download the installer over the internet(this is especially true for games with size over 2 GBs) ; secondly, I just like having retail boxes lying around ! :-) (even if they take some space)
I however don't buy retail games as often as I'd like to- the main reason being that retail prices are exorbitant in Cyprus (where I live), at least compared to prices in Greece(where I go on holidays, as I come from Crete-such an example I saw recently is GTA-Vice City for 10 euros in Cyprus, rather than 5 in Greece, or Sleeping Dogs for 20 euros in Cyprus rather than 10 in Greece- and this in the same electronics store chain!)
As for what retail games I buy, I pay attention so that the games I get don't require Steam(I don't like Steam, and this dislike mainly stemmed from my aforementioned not-so-good internet connection and my dislike for autoupgrades, but now I have even more reasons to not touch Steam, reading the negative experiences of other people). Other than that, I don't care even if they have an offline activation code- as long as the whole content of the game is on the disk and the game doesn't need to call home, I'm fine with it.
At any rate, I end up getting mainly older games on retail or indie games that have no Steam requirements. Just to give you an example, here are the retail purchases I made this summer while in Greece:
-Silent Hunter 4-I bought this from a DVD store that also rents console and pc games and cleaned up old stock for 6 euors-it didn't seem to have any Steam type DRM, but I guess I'll find out when I install the game.
-Diablo II +the expansion-10 euros(it was however brand new and with Win7 compatibility as it was sold by the Greek part of the aforementioned electronics chain)
-Star Wars: Knights of the Old Republic Collection(with KOTOR 1+2)-8 euros(same as before)
-LEGO Harry Potter: Years 1-4-10 euros(idem)
-The Raven: Legacy of a Master Thief-10 euros(idem-note that, according to my purchases log, I bought it on Aug 21 ( a few days before GOG's revamp and its consequences and in retrospect I did well, seeing that The Raven now on GOG costs 25 euros/$32.90 with the newly imposed regional pricing-plus the retail version also has a manual)
-Alpha Protocol-5 euros(this one's cheaper as I bought it from an online greek store which has "Crazy Sundays" deals with rather low prices- I heard from the forums here that this was an underrated gem and thus grabbed it thinking I wouldn't lose anything to try it out)
-Captain Morgane and the Golden Turtle(pretty much same case as before-btw, I'm aware this was in an Indie Gala bundle or something as a Steam version, but I don't like Steam and wanted to try this game so...)
The latter 2 had offline activation codes (and maybe one of the others, but I don't remember which one).
And that's all about my retail purchases- I guess I should get with playing some of those next time I'll be on holidays(as those seem to be some fairly time-consuming games, and I'm right now swamped with stuff to do. :-/).