I think so long as you're looking at the long term then negative equity really shouldn't be a problem.
Got to admit, I wanted to hold off buying a property for as long as possible, but in the end, I'm glad I jumped on the property ladder 18 months ago.
Not too worried about potential house price falls as I've been over paying my mortgage already.
Even still, always had it in mind that in a worse case scenario we all buy a little caravan and live in that. Not fun on rainy days I'm sure, but so long as there's a roof above our heads, that's all that matters.
2c.