My own research goes back to the mid 1600's on my husband's line. I have been extremely lucky with this line as they were Protestant landowners, at every turn, the line marries into a well researched lines that seems to go back to year dot! But I have done my own extensive research for our direct line and researched to verify the ones that we married into and had already been done... even Burkes peerage has errors.
I am still finding new things every single day on our direct line. At the moment, I am tracing down the siblings of my husband's 4xgreat grandmother. Newspapers, irishgenealogyie for bmds, military records. Going back further deeds, TCD records and Bethams will abstracts have been used confirm my research.
But on my husband's maternal RC line, I can't get any further back than his great grandmother, absolutely nothing so say where she was born. Married in Drogheda in 1871, had many children and died in 1905 Drogheda... and that's it! No civil record of her marriage, only a RC parish record and witnesses are not relatives. Lots of family myths which have sent me round in circles but all been proved incorrect in the end???
I have also found the petty sessions on FindMyPast enlightening, lots of fun things to find on there
Researching Irish roots has become so much easier in the last few years, I find it more fun than researching my own paternal line back in England... the only line I haven't found an Irish link, well not yet