Rachel and Vincent's AT
Rachel and Vincent's Rumba
Rachel and Vincent's Tango

Off the top of my head, and not necessarily in order:

Rachel and Vincent's Rumba
Cherie and James's Rumba
Tom and Camilla's Quickstep
Austin and Erin's Paso
Austin and Erin's Jive

These are the dances I most remember....

1. Austin & Erin's Paso
2. Cherie & James' rumba
3. John & Kristina's Waltz
4. Lisa & Brendans Waltz
5. Rachel & Vincents AT

So many good ones to choose from but here are a few that spring to mind....

Lisa & Brendan's VW
Rachel & Vincent's Tango
Austin & Erin's Paso Doble
Cherie & James' Rhumba
Lisa & Brendan's Foxtrot

Austin's paso and jive.
John's paso.
Cherie's rhumba? Didn't like it but it was memorable (ish).

Jodie and Ian's waltz. The highlight of SCD 6 for me.

Every one of Austin & Erin's dances.

From Hayley

Cherrie and James Rumba

Rachel & Vincent's AT

then in no particular order:

Cherie & James' Rumba
Austin & Erin's Tango
Rachel & Vincent's Tango
Tom & Camilla's Quickstep
Austin & Erin's Paso

Rachel & Vincent's AT closely followed by their Rumba.

Rachel and Vincent's AT