While I was thinking further on my previous post about healing types, I realized that the breakdown in healing style really comes down to this:
There are druids out there to fit all over this graph. I'd place myself, as a 10-man raider in a "hardcore" 10-strict guild, pretty close to the middle, going up a little ways on the y axis towards PvE.
Pure 25-man raid healers who barely touch a tank, or at least no more than they do any other member of the raid, would be far on the Raid-Healer end of the spectrum. Speccing and playing in arenas or battlegrounds compared to pve content would budge a person up or down the scale on pve/pvp: degree would vary depending on proportionate amounts of time spent in each venue and how much they spec for it. A pure tank healer would be one who focuses on tank healing, be it by nourish or HT. In terms of pvp, the tanks may be yourself and an arena partner.
I'm going to tentatively say that the interest in crit rating would increase going from left to right on the raid/tank spectrum, with crit becoming more important the more a druid needs to heal tanks. At the same time, there is increased interest in nourish and regrowth: but that may be more limited to the PvE half of the spectrum, rather than PvP. Towards the far left, there is increased reliance on rejuv and wild growth (in 3.2) over any other spells.
As for haste, I think the interest is pretty unanimous across the board, with all kinds of healers finding usefulness in lowering their GCD and cast times.
Some of the most densely-populated areas of the graph would be, I think, the middle area (generically 10's, 5's, and leveling druids), and the upper left (pve raid healers). I've been out of the arena loop, so I'm unsure where most pvp druids would congregate on the graph in terms of tank/raid heals, but even they may vary depending on whether they heavily battleground vs arena, and possibly even in whether they are in 2's vs 5's.