Cute, homemade greeting cards are not just for women, but also can be for men/boys. Here are two examples that I have made. I have a few more to share with you, but I still need to download those pictures.
This truck card is one I gave to my husband for valentines day. I cut out several hearts and layered them in the back of the truck. To give distinction between the hearts, I put a stitching around the edges and then stamped a few with affectionate words.
This sports car card I gave to a sweet little 3 year old for his Car's birthday, but it can obviously be given to a man as well. I used black ribbon to make it look like it is driving down the street.