What are the Pros and Cons of not being Mo/Mes/N?

Pros of being Ranger or Warrior or Elementalist as Primaries:

Movement, they all have speed skills that the others don't (the mesmer mus suffer crippling for 15 seconds after Illusionary speed ends).

Ranger and Warrior Armor, the best in the game (AL is the highest)

Rangers and Warriors have skills that are almost impossible to interupt.

Snares, Rangers and Elementalists have some of the best snares in the game

Warrios have the most runes in the game (axe, sword, hammer, tactics, absorption, strength).

Elementalists have the most energy in the game

Rangers have pets (no need for a corpse)

Rangers are the most versatile characters in the game

Warriors are the only profession that doesn't really need energy to be useful

Expertise is the only skill that can reduce energy used in attacks, mesmers need to cast spells to gain energy back.

They have good protection skills/spells

Cons:

Warriors have the worst energy pool in the game

Elementalists are tied for the worst healing skill/spell in the game (tied with Mesmer)

A servere lack of party skills (Warrior has Shouts, and Ele has wards, ranger has spirits, but do not really help everyone in the party)

Elementalists have slow casting for AoE spells

Elemantalists can suffer exhaustion

Many of Elementalists have high energy costs

If you were talking about 2ndary professions, then almost every pro is gone and all of the cons still exists. I am not talking about Warrior here I am talking about Monks.I am asking what is the benifits for those who choose not to play Mo/Mes or even Mo/N if they use MoR,E-drain or OoB.What if they want to use thier Monk elites for say protect but we all know what the best healing elite is WoH.What NikkiIsNub said is right.

A servere lack of party skills (Warrior has Shouts, and Ele has wards, ranger has spirits, but do not really help everyone in the party) You're right on everything but this part.
War: Watch Yourself, Shields Up, Retreat, Charge all affect whole party
Ele: Ward vs Harm/Melee/Elements,Ward of Stability all affect whole party in the ward
-----------------------------------------------------------------------------

To OP:
/W means you basically cannot use the weapons unless you are a thumper or assassin/warrior (Melee casters generally are subpar)
/E means you don't have the energy pool (Mes/Ele is an exception...but you still get exhaustion)
/R means all bow attacks, preps, traps, etc. cost the full cost...which means you won't be that great of a ranger

Generally the classes that rely on weapon for damage (assassin, ranger, warrior) need to be primary because without their armor/runes the weapon attribute is hard to pump up withotu sacrificing other attributes.

You're joking, right? Signet of Devotion is far and away one of the best skills the Monk has to offer.

Also, regarding the original question: pros and cons of not being mo/me?

Cons: No Energy management, and you will therefore suck.

Pros: You'll...uh, be unique? I guess? Signet of Devotion is not one of the best skills the Monk has. It is a signet, which means no energy cost, but at the price of 0 help from Divine Favor (except the fact that it is linked to Divine Favor, so only the initial heal is there, but no DF heal).

Cons, no energy management? Blessed Signet, Peace and Harmony, Balthazar's Spirit, Essence Bond. But of course, they don't compare to a Mesmer's ability to gain energy. (No Sarcasm).

I have a Mo/E and my energy is well maintained.

Honestly, in PvE, I haven't seen too many Mo/Me. I've seen some, but not as a majority. Maybe I've been hanging around Canthas now too long. But in Tyria, I remember when Monks were very, very scarce, and I still didn't see many Mo/Me.

Oh well.

Most people don't play only with monk skills, because energy becomes a problem. That's why people go /n or /me in the first place.

Lasting through a battle becomes more important than big blue numbers for a little while as the game progresses. while playing a heal monk i usually take all monk skills. i normally dont have energy problems. the only time i have had energy problems is a bad group or other monk wasnt doing a good job, i have been the only monk in a party many times too. i use a max insightful staff with the 20/20 healing on it as my main weapon. if i use a rod and focus i have the +5 energy wayward wand for healing and use it with the 20/20 healing focus. i also have the +15 energy/-1 regen focus if needed and a +15 energy/-1 regen rod if needed in a really bad situation.