Dont suppose you can give a few pointers in Guardian builds /weapon choice? Or does it not really matter a huge amount whilst levelling? I was rolling a mace/shield & staff on my travels last night, although I remember the 2h hammer having a fun knockback (always made me chuckle)
Personally I run Greatsword as my main, then either Scepter+Focus, Sword+Focus depending on what I'm doing.
Hammer is great fun in WvW (especially Edge of the Mists where you can punt people straight off the edge
), but not really very good for general PvE.
Staff is great for tagging mobs and mobility, best used in WvW, or when you're farming big zerg events (like the current Lions Arch content). Because Staff auto attack is a huge cone of cleaving damage you can tag lots of enemies at once, meaning you get kill credits for all of them, meaning you get lots of loot. Damage is pretty weak however, so it's best used in big groups like zergs. Staff 3 also gives a nice speed boost for getting around quickly, and staff 4 gives a lot of Might buffs to your party/zerg for better damage. A good all round support weapon.
Mace is very very weak damage, and sooo sloooow, but it's the most tanky weapon as you get constant heals, and traited right it gives a lot of healing power boosts. I'd avoid generally.
Shield, lots of people run because shields look cool on the off hand, but skill wise, shields don't bring a lot to PvE, a short duration protection, and a bubble that stops you doing anything else... meh. Though the shield bump from skill 5 is sometimes useful for positioning enemies, however the same thing can be achieved by other means.
Greatsword when traited can give Guardian good DPS, a small heal on hit, lots of control (skill 5 is fantastic at grouping enemy mobs so they can be AoE'd down). Skill 3 gives you a gap closer and leap finsher with an additional blind on hit.
When going into a fight try and get between as many enemies as possible, hit skill 5, then skill 5 again to pull them in to you, hit skill 4 to drop an AoE light field that also applies vulnerability, then hit skill 3 to leap finish for a blind and retaliation, then hit skill 2 for a close AoE whirl + whirl finisher for lots of DPS.
Sword is the guardians highest single target DPS weapon, when traited right its auto-attack will actually give DPS very close to a zerk warrior. Also has the bonus of a teleport gap closer. Skill 3 gives you a small reflect and short range projectile attack, but it's pretty weak and doesn't last long. Auto-attacking actually gives more DPS, so only use if you really have to. Sword is better than a Greatsword when you are fighting a single target if damage is all you are after.
Focus. This is my offhand of choice. Much more useful than a shield I find. Skill 4 is pretty naff, it's weak damage, very situational, and doesn't help a whole lot so you won't use it often. Skill 5 however can be a life saver. Skill 5 basically nullifies the next 3 attacks, no matter what they are. Great for when you've run out of dodges and you know that boss is about to hit you with something BIG. Smack your emergency button (skill 5) and bam, 0 damage. You live to fight another day! Also, even better skill 5 is a burst finisher, so if you lay down a fire field first (preferable!) you and anyone else around you also gain might stacks on use. Very nice.
Scepter. Highest dps ranged weapon in the game (as long as you are hitting with skill 2 on recharge). Skill 3 is also a very useful control skill. Useful for when full melee isn't a good idea and you need some decent ranged damage. Great for things like the Fire Elemental at the end of the Grawl fractal.
While you are levelling it really doesn't matter what you use, but you'll find you can kill stuff faster with Greatsword and Sword. Saying that while levelling I used hammer almost exclusively, just because I liked using skill 4 to punt stuff across the map