I recently made the decision to rebase my entire Iron hands army from 25mm to 32mm round bases. Simply put, it looks so much better and it is the new standard, officially or not.
I did a quick proof of concept on an old base for the style before making the move. Previously I had caked the bases in orange MIG pigment, but that was very messy and after fixing the pigment, it lost its vibrancy. Here he is in the middle amongst my older style bases.