I am just curious what everyone's favorite tip number is when doing large orders and just a simple/basic swirl.

I don't know the number but I like this:

http://www.etsy.com/listing/62673567/extra-large-round-pastry-tip-for-cupcake

or

Wilton's 1M
http://www.wilton.com/technique/1M-Swirl

Depends on how u want it to look.. If u want it smoothe the picture above is good or u could not use a tip at all to get another smooth look.. 2d is a good tip if u want the swirl look

I just cut 2-2 1/2 inches off of a disposable bag, fill it up and go.

http://cakecentral.com/gallery/2110708

If you want the round swirl use Wilton 1A or 2A
If you want the classic swirl use Wilton 1M or 2D

Thank you everyone. I have been using the 1M but was curious what others were doing. I will try the others and see what I think. Thank you so much! I love having a forum like this to use as a sounding board, my husband while supportive, often looks at me and says "huh?"

This isn't a "tip" tip. When dealing with large orders, get yourself a 24 inch pastry bag and learn how to use it. Buddy talked about it in his book. I then started watching for it in his shows, especially in the early shows. Once you figure out the technique, it's a huge time-saver!