Play 'em all, as often as you can, for as long as you can resist buying. When you buy, have the right balance of playability, tone and timbre, durability, and appearance to suit you. Remember that the appearance is somewhat like the automobile's colour in that it matters nought when you're going 130km/hr or are being broadsided by a truck. Unless you want a simple backup axe, don't buy one that sounds like your other(s), but one that compliments you and your desired sound.

Peace, Mooh.