Depends on who I'm playing. If it's a weaker player, I'll just charge blindly ahead. If it's a competent player, then I'll run to a safe spot to re-evaluate my options. If it's a predictable player (whether weaker or stronger), then I'll try to exploit their predictability.
Oddly enough, there's an very good player that comes to mind whose predictable (and thus, exploitable) in his choice of starting moves.
EDIT: Actually, what I do is very dependent on the stage we're playing on. What I wrote above was with Hyrule Castle in mind. On Dreamland, if I start in the middle, then I'll usually charge ahead regardless. If on the platform, then I'll try to move to a safe spot. On Peach's Castle, I'll usually perform a fast, defensive move, but that depends on how far away I start from my opponent.