Well if you choose to do raiding, choose fury and arms if you choose to play pvp. I'd say use double time.

I just want to boss and have fun ... I'm not planning to pvp. So your saying arms is better for bossing? Also I wana do a lot of dps.

boss? If you mean raiding, do arms until you can be fury dual wield.

Ya I mean basically I'm just playing myself .soloing. So once I can dual wield I should switch over to fury ?

You mean questing by yourself? If so I would choose tank(protection warrior). Really op at low level questing.

Kinda but I just want to level up a lot and eventually start doing raids

I would just go to fury once your able to dual wield.

You play Arms, fury is not a strong spec until level 90 and you have a high item level with a lot of crit.

Its all down to personal experience, Arms is a bit slow and sluggish at level 10 without heirlooms but fury is a good way to go until 30~45 id say for general play as it has a nice flow to it and rage build (or whatever the energy resource is) flow , at 30 you ca learn dual spec and then try out arms with a few more abilities etc.

People saying about fury at 90 is better it does depend alot of you having good gear at 90 but it also means alot to have a good team , have witnessed it plenty of times a fury warrior is very good gear doing peanuts as they havent got the extra help from a proper team behind them but the second they have someone they are used to playing with theyre DPS goes sky rocketing