In past history, women used to dilate their pupils with the use of a rather deadly plant extract, because dilated pupils do indeed appear to be more appealing to human beings. The drops which eye doctors use today are still based on the chemical in that plant, I gather.
It's long been known that the pupils of a person in love tend to dilate when looking at the person they love. Advertizing companies know that a print ad showing a person whose eyes have dilated pupils will be more appealing to consumers, so they often photoshop dilated pupils.
However, I wouldn't imagine it's a good thing to have your pupils dilated on a regular or prolonged basis. The pupils need to alter their size according to light levels, and to be able to constrict is a safety measure to protect your retinas and thus your vision.
I suppose you could always ask your eye doctor the same question you've asked here, just to confirm, as I'm not qualified to say but I'm just guessing that it's probably not a good thing to make a habit of.