In one year he'll be nice..... in two years he'll be real nice! Seems to have some decent genetics. His rack is real uniform and tall. Could be some potential, depending on a few factors like, genetics, habitat, nutrition.
If you want to kill trophies year in year out, then you must manage your deer herd. Ideally you would only kill deer for 3 reasons. 1. To harvest a mature trophy animal. 2. To thin the doe herd (meat time). 3. To harvest animals with poor genetics or undesirable traits. (old mature buck with small, thin rack.) Because aging a deer is very difficult with just glimpse's, you should try your best to keep an eye on your herd all year round, trail cams make this easy. Scout and scope is also a great way to obtain information. You will soon begin to "know" your herd, who's in it, how old they are, where they bed, where they eat etc., etc. By doing this you can then assess your hunting situation on the spot, and decide weather or not to make the kill. It has been said that a successful season begins when the last season ended.
Bucks peak out at about 5-6 years old. This is when they are fully mature, and still in the prime of their life. They then begin to decline, not only body size, but antler size as well. If a 6 year old deer had that rack, than he should be removed from the breeding pool. However this deer appears to be young maybe with awesome genetics 1.5, but realistically closer to 2.5 years old. I would grant him a free pass. You want to give all your bucks a fair chance to reach maturity. The next couple years are going to be some of his fastest antler growth years in his life. If given the time to mature, you may be asking us who the best taxidermist is, rather than too harvest? or not too harvest?. So let him walk, and wait for his daddy. And if this is what your trying to do, then check out QDMA.com its a wealth of knowledge. You may also want to get in touch with the other people who hunt this land, and see if they have similar hunting goals. It's always easier with more eyes and more hands to help.
Besides, it's a good idea to wait for the rut before you take a buck, reason being that hot does will bring in mature bruiser's for miles. Big old mature deer got that way from being smart, and during the rut they put down their defenses and become far less skiddish. That's your best time to get a mature deer. I can say with confidence that most of the slob mature bucks are taken during the rut. Good luck