Nano Micro Caps VS Large Caps - What are you picking

Buffet and Munger were frequently quoted that if they were working with a smaller amount they would probably be looking into very small cap stocks. In fact, during the partnership eras they invested in stocks that would be considered nano cap by todays standard. There are certainly alot of misspriced opportunities in this market mostly due to lack of institutional awareness and lack of mentions. But the lack of volume and sometimes limiting data quality can make more risky investing. What do you guys think? The vast majority of us are working with small funds and yet rarely do you see a < 1b cap stock quoted around here.