Nice!! In classic I even MT’d ZG a couple of times. I OT’d in MC, BWL, AQ-40, and in Naxx. So I can say that shammys can be OTs throughout.
Now in TBC. In P1 leveled as a tank, tanked heroics, tanked in Kara and OT’d for Gruul and Mag. In P2 I got to OT in SSC and TK. In P3 and P4 I haven’t done much with the shammy (my guild had too many tanks so obviously made sense for me to switch).
But I did get to tank the first three bosses in ZA yesterday! that was super fun!