I've been working on an urban fantasy serial with a teen MC and up until recently I was set on starting with a bang. This resulted in an opening scene with a whole lot of running, tension and a glimpse of the character's perspective on life. The MC's thought pattern is arguably grim but I kinda like that it starts in media res. It has this sense of urgency that could make the reader wonder what the MC is running from. Of course, I also have to face the possibility that this could be a big honking cliche. Sigh. And did I mention the angst?
The other opening scene I wrote is a slower in terms of pacing and arguably does not offer as much insight into the character. I'm thinking this dials down the angst a little bit, but there's also not a whole lot going on. It has a creepier vibe than the first opening, though.