As a fluke, I started doing a series of caches. For some reason, the cache name "I Spy..." was stuck in my head. Hence, the "I Spy..." series began. At one point, I was going to do a bonus cache for finding them all, but decided not to go back and fill them all back in. Besides, some were archived and gone, so I couldn't really do it that way. Well, I kept putting more and more out, but never did a bonus. The names that I use are Irish Gaelic for those who hadn't already figured it out. I have quite a bit of that in my background. I also have an obsession with things Celtic. My wife enjoys it too, and I love to share this stuff with her and the kids as these caches are created. I have enjoyed making them and while they are varied, they are loosely connected in my head. As the hide is crafted, I always seem to know if it will be in the series. There are some more I could do, but they'll have to wait for some far point in the future. For now, I will get this one more out for others to enjoy. The series is one I will continue for some time going forward.
FTF gets a shiny $2 bill.
This is not the hint you're looking for.
Puzzle hint: I don't think it needs more than I've given, I know I can count on you. Hide: It's a regular in the obvious area