I've rather found I've gone the other way recently to be honest. When I started I was all keen at hill seeking as they were an achievement and I kept seeking out worse and worse climbs - not caring that I was slow.
But I've kind of hit the wall with climbs like the Devil's Staircase that I just cannot do and cannot see myself ever doing. Accumulative climb will wear me down over time too - I find that after about 3000 m cumulative I start to walk them - gearing lower and lower doesn't really help as I just go slower to the point where I might as well walk.
I am on a mission to lose weight properly currently though - maybe that will rekindle my enthusiasm. I did put a shedload of weight back on at the back end of last year, this hasn't really helped me this year. I'm about 12 kg heavier than I was when I started audaxing. (Although that was a full 25 kg lighter than before I began the riding in May 2012).
I do appreciate that you tend to get the best aspects of Welsh scenery if you are prepared to ride up Mynydd Epynt etc...
I also will do the Tumble one day - that's local and doable, I just haven't done it on a ride where I've done less than 2000m before I get to the bottom yet