Legal & General (LSE: LGEN) has the biggest forecast dividend yield on the FTSE 100, at 7.25%. Legal & General was one of the most heavily bought stocks of the month, again, last month. With that in mind, Legal & General and Aviva are my top two personal choices. And I'd almost certainly have bought Legal & General if I didn't already own Aviva. Dividend reliabilityThe biggest weakness for Legal & General for me comes from management's newest policy of raising its dividend by just 2% per year.