Crew neck will always look decent, at the very least normal. Its not something I'm going to notice really.
Some can wear a slight V well, but it can go sour very quickly. Its more noticeable, so when it goes wrong: it is wrong loudly. It tends to only look good on fitter guys, and the neck can't be too deep.
And for the love of all that's good: please straggly chest hairs peeking out. That isn't not what you want girls to fixate on. I garentee you, v-neck shirt wearing guy- you have better features to let shine.
I don't know what a 'normal' v neck is. I like shallow V's, they give more structure then a crew, but the trend in recent years has gone deeper and deeper. I consequently own no v necks and my old ones died.