A recent meeting with a very talented young photographer, Peter McKinnon, prompts me to write about lens choices for a moment.
Peter, who is a student of mine in the Advanced Flash lighting workshops, showed me a wedding album and other wedding shots he recently did. He showed me a wedding he shot on his own, entirely with a 24mm prime lens, and much of it at f/1.4. Never took that lens off. No long shots. No zooming. Just Peter and his wide angle lens. Fantastic work.
The 1D Mark IV makes a lens look 30% longer, so that’s 24 x 1.3 = 31mm. Roughly equivalent, then, to me using my 35mm f/1.4 lens on the full-frame 1Ds Mark III body.
Mmm. That would be liberating: one lens, a wide one, for an entire shoot. And I have mentioned before, for events this is my favourite lens.
Selective focus:

Cat, by Michael Willems (35mm, f/1.4)
Low light ability:

Club, by Michael Willems (35mm, f/1.4)
And both, available light and selective focus:

Couple, by Michael Willems (35mm, f/1.4)
So I checked. The last wedding I shot, I used my 35mm lens for fully 30% of the shots! I too love the shallow depth of field:

Bride and Groom, by Michael Willems
And I like the ability to get it in and to not have to worry about how to zoom.

Groom getting ready, by Michael Willems
So here is my suggestion: that you too spend an entire day shooting with one wide angle lens. This will free your mind from deciding on lens, zoom, and so on, and open your eyes to the photos in front of you. And that is what photography is about: photos, not cameras or lenses.
And you know what: I’ll do the same, on my next event shoot.