do u see good deal then buy? 

if you don't even know why you want to buy other than the good price, then don't even buy it, it's a waste anyways.

ask yourself what do you lack of from the 18-55 lens? focusing? IQ? build quality? or? If it's just little matter, then you don't need to upgrade at all. If it's more important things, like focusing speed and accuracy if you shoot moving subjects a lot, then consider to upgrade.

Even if it's a good deal, but if you don't really need it, it will only collect dust and left unused after bought.

it is not the lens but the photographer that decide how the image is created. 

having a good lens does help to give you some special edge but that has nothing to do with creativity.. you have to horn those skills yourself.. If you are lucky to have a good mentor than you will progress a lot faster (hopefully) but it all boils down to good habits and practice.. Going back to the same old boring place is good at horning your skills. You get to correct your mistakes. 

I can stand on the same spot at the same time each day on top of the bridge with the same hardware and still come up with totally different effect each time... I dont get bored.. I just go home, critically examine the photo, go back and take another dozen in the next opportunity. 

Once you master that , you hopefully learn and understand your hardware a lot better and then can decide what is your next best addition.. to pick a prime or zoom? all that will be part of your learning curve.. no short cut..

If you have deep pockets then it is a totally different story.. you can afford to buy to show and tell if need be.. that is a different game. 

and lastly, each area of subject interest require different approach.. you am like them. you may not.. or you may even change through time.. they my require different hardware too..

Have fun and take plenty of pix.. you have already paid for the equipment..  it is FOC after that..

Nono, why did you even think of buying a new lens in the first place? What do you want to do that your 1855 is limiting you? Do you want the 1585 because of the additional 55-85mm zoom? Or the USM? What?

if this is the only reason, better forget about it. ppl get specific lens for various kind of photography needs

don't buy better, use those money in places you need more.

depends, Av 90% of the time, M for flash. Tv for sports sometimes. Modes don't matter that much, as long as you know what you need to take control (iso? shutter speed? aperture?)

mostly full manual. almost 90%. only when shooting sport photography will changed to shutter priority mode

i not sifu, i'm a hobbyist. anyway, if u want to learn photography skill, u must force urself to set ur camera settings with all manual

and forum is where we come by crappyadvice like this.

please ignore the above. you need not force yourself to set your camera settings to all manual to progress in photography.

The 15-85 is a superb lens. I've been using it since 2011 and it hasn't failed me, it's my all-rounder lens and my favorite.

Maybe it's time we organize a lowyat.net photo outing again. It's been a while.