MOST important: 2,3,14.
LEAST important: 8,12,17.

Some of the others are real turn-ons, however, and might sell me on choosing one rowdier over anther. Female condoms and Massage (if indicated that it is at least Above Average) are two such samples.

ost important   3 6 13
least important  1 8 9  
 
Everyones list will depend on their situation.  Sex (intercourse) is not important to me, because I always finish with a BJ

and in order of importance from A. Left being the most important to Right
from B. Left being the least important to Right

A. 14, 3, 2

B. 18, 1, 9

I will add, that that though not as important to me
they ARE MORE ATTRACTIVE TO VISIT when they offer the most services

Alway a bit tongue in cheek, but I like that too!

Most
KISS - sets the mood and pace  
DATY- kicks things up a notch
BBBJ - pre-sex hardening agent

Least  
  1 - masseuses for that, but I do like to give
  8 - 2 Guys .. isn't that a department store  
12 - my motto of NO TEETH says it all. Paddles? NTY

Most Important:

1.  Blow job (without condom is a must)
2.  Kiss (LFK as a minimum)
3.  Lick pussy

Least Important:

1. S&M
2.  more than one guy at a time
3.  allow film or picture

Well of course, not being limited is most important to me!....

but If I HAVE to (pouting), I'll say:

MOST important: 2, 6 and 14
LEAST important: 8, 12 and 1

Most Important - 3,6, 14
Least Important - 8, 15, 18

most important - 2, 3, 6  
least important - 8, 17, 18

I'll play too!

Most important: sex, kiss, lick pussy
Least important: s&m, more than one guy, film and pictures

D

More than one guy, filming, and bring second provider are at the bottom

A. 4,7,14
B. everything else

1. Kiss 2. Lick Pussy 3. Massage/Sex tied

16. Anal 17. More than one guy 18. S&

Most important:
2, 9, & 15

Least important:
8, 10, & 12

But the ones I look at when checking out a review or doing a search are:
1, 2, 3, 4, 6, 9, 11, 13, 14, 15, 17, 18

I don't have to have it all but I want enough of the items that I like to make the call.

Just kidding.  For me, the most important are 2, 6, and 14 (if 14 is OK, it can be assumed that 4 is also OK).  Least important would be 12, 17, and 18.

Most 2 3 and 14  
Least 8

I enjoy everything else.  

Most important:  2, 6, 14

Least important:  8, 12, 18

5 is the most important

lol j/k.

sex is required.  after that, 3, 6, 9.

least important 8,15, 17.

I'll bet you can surmise what I like.

most important:

sex
kiss
lick pussy

 
least important:

two girl action
more than one guy at a time
s&m

DFK - Yes, kissing sets the mood and is a good warm-up
DATY- The provider should have a good time too  
BBBJ - Nothing like warm lips and a sensuous tongue giving your privates a tongue bath
 
Least  
 15 - Anal - not into the back door
  8 - 2 Guys - not into sword fighting either  
 17 - Riming - see #15 abov

1) We are both comfortable together.  2)  We may allow this to lead where it may.  3) I have no check-list as to sexual activities that are supposed to occur.  This isn't like collecting baseball cards!

The rest can be fun but the top 7 are mandatory for a great score and/or a great time IMHO.
I am not a huge fan of anal, but as the 8th item on the list to make it complete, all 8, plus a personality gets you a 9 or 10

Most Important - For me 3 (BBBJ), 9 (At least offered), & 15 are what I specifically look for.  

Least Important - 1, 8, and 18

MOST:  17, 2, 3
LEAST:  8, 13, 11