Whichever makes you more comfortable. I prefer to use a climbing stand because it offers a chance to change your setup easily based on the conditions

this will be my first year bowhunting as well, I will use my treestand about 90% of the time, i might pull out the old blind once or twice this year.

Treestands are the better for bowhunting. I bow hunted with both a tent blind and treestand . You can see further out and catch deer moving while in a treestand. It harder for deer or bear to smell you or spot you while elevated in a treestand. I had deer circle my ground blind and snort at me. Never did see them because there was no window in the back of the blind.
Put some camo cloth around your treestand to break up your silhouette. Wear a safety belt in a treestand and best of luck bowhunting.

Unless you hunt where you can leave your blind for a few weeks befor hunting it without getting it stolen go with a tree stand. The first time you pop up a blind deer will have no problem picking it out. Its like if someone put a random poster up in your house you would notice to.

A tree stand is a lot more interesting because you generally see more and farther. Ground blinds can be effective but deer can more easily bust you. Still hunting is very hard when you first start out but can be deadly if you do it right. Remember scent control which is a key to seeing deer. You have to watch the wind no matter which strategy you use.

whatever you feel most comfortable in

fezzant brought up a good point. natural blinds can do wonders! why? because they are barely noticable to a deer if at all. If they don't see anything different and you are playing the wind right. you get a shot.

Really depends, each have their pros and cons. Treestands are probably a little more forgiving for a beginner, a little harder to get busted. Although when in a blind, the deer can't spot movement as well.