I'll be honest - I don't think I particularly want to finish!!
Yes, I'd dearly love to knock down some of my longstanding brickwalls but I don't think I could bear to stop delving! Over the last 15 years, every time I thought I'd come to a dead halt, some new info would become available, or I started going sideways and looking into siblings lives. 'Sideways' comes up with some fascinating discoveries and, often, these discoveries lead to further info about my direct ancestors.
And then, of course, there was DNA!!! Certainly unsure about the pros and cons of doing the test to begin with, I'm now completely sold and would recommend taking the plunge to all serious family historians.
I have a particular relative (she will remain unnamed!) who regularly voices her (unsolicited) opinion that its all a waste of time. Her thinking is that why go any further back than the people you can remember? Mind you, her interest in history is confined to tv costume dramas - I think you have to have a strong interest in history in the first place to get involved with genealogy (and to know NOT to pronounce it as geneOlogy, which is one of my bugbears).
I've certainly learned not to mention family history in any conversations unless I know for certain that someone is interested in the subject!!