The most realistic front attachement for lace is glue. Remember to use a very thin coat, let it dry before attaching, and use something like comb teeth to gently press the lace into the glue so you don't mash the hair down.

However, for some styles and looks, there are guys who definitely do tape the front. ST30 stretched out really thin and molded to the hairline was popular for awhile and I assume some are still doing it. Some guys purposely design their hairlines to a standard tape curve to make lining up pre-cut pieces easier, etc.