Two reasons ; earnings and understanding.
First : Au share dividends are mostly franked , increasing the real yield substantially..
Second : I have some feel for the economic and political "pulse" of my homeland, offshore it's much harder.
I think the second is very important, in that is important to have a good feel for the company that you are invested in and to know the marketplace that it is in so that you know when to sell. Some of my failures have been when I was not aware that the company or sector was going bad.
I mainly buy Aussie companies. But have some international. For greater diversification into internationals I use my super funds where others are more in tune with the markets.
A bit like Buffet, I look for
well run companies that have a competitive advantage and who have a business I can readily understand and have a feel for (that way I am more likely to know if things are turning south). I am wary of wonder stocks that may have zoomed doe to just one innovation, that may then be lost when the next companies invents its new software application etc.
I do tend to be counter-cyclical when I buy and so look for companies who may be out of favour.
James Hardie has been good for me as I bought them when they were on the nose, but were a sound business with good building products that were underutilised in many international markets.
Resmed and Cochlear both had technological advantages in the booming medical field suited to aging and affluent populations.
Yes I bought Qantas when they were cheap.
Best thing I ever did share wise was to buy into the Commonwealth Bank Float and to re-invest the dividends. Boy has that compounded well.
Hitting 59 this year and so I will once fully retired (ie Capital Gains Tax paid will be less as my marginal rate of tax will be dramatically less) will look start selling off some shares to simplify things. In part as I will be travelling more for extended periods when it is easy to miss crucial fluctuations in the market. I am now semi-retired and don't really want to be bothered monitoring my current twenty odd stocks when away on longer trips that I am already taking.
BIGGEST TIP: Beware of stock tips as people will tell you when to buy a stock, but not when to sell out! So unless you understand the company and the market do not buy as you are only then gambling and not investing. ie I got burnt by buying ION on a tip, and the guy was an ex-stockbroker!
So yes listen to a share tip, but do not buy it unless you understand it and are willing to take the time properly to understand it and to be in position to
yourself decide when to sell it.