Where bigchrisb when you need him? He is the most leveraged person I've seen around the fora.
If talking about leverage on stocks, agree 110% (including a bit of leverage:). However, I'd argue that compared to a lot of home buyers, I'm not very leveraged at all - many would view someone buying a house with 30%-50% down as being very conservative. Either way, its debt, secured against an asset, which means that if you default, the lender has the option to take your securing asset. Stock on margin is just lower risk for the lender, as its less politically damaging to chase people on negative equity.
Yes, I've used a lot of leverage, and continue to do so. There is a substantial yield/interest rate spread between Australian stock dividends and margin loan rates. I've had a wild ride, including margin calls, lots of paper losses, and over-enthusiastic buying. At the moment, with stocks at a high point, things are looking very good - since the start of 2008, my annualized pre-tax return on my capital is currently 18.5%. However, over that period, that number has fluctuated between -30% and +20% - a very wild ride. I'm pretty risk tolerant, but I've certainly lost sleep at night at times.
Overall, I still believe that leverage is a useful strategy - I view it as selling my risk tolerance - I take the risk premium of a wild stock market ride, and I give the lender a fixed rate of return.
That said, I'd be cautious about leveraging up too much right now. It will spark a market timing debate, but I'm currently trying to de-leverage a bit, with stocks at their current valuations. To date this has been by paying new money into debt reduction, but in the last couple of days I even sold some stock (about $20k of Australian bank shares). I'm doing this, because:
a) I'm being naughty, and trying to time the market, and
b) My stock portfolio is large enough that it spins off enough dividends for my current lifestyle. That changes my priority from growth to preservation. Leverage is great for growth, but can bite you on the volatility/preservation side, particularly in the event of a margin call.
For disclosure, my stocks/leverage by account are:
Super: $135k, no debt
Holding company: $87k, no debt
IB: $190k, $97k of debt (51% gearing)
ANZ: $572k, $400k of debt (70% gearing, the one that worries me most about margin calls)
Best of luck with it!