Howdy Jeff! It's tough to choose an absolute favourite between my wharnies, but I will say that the #55 Hound Tooth gets the most pocket-time. Such a good lookin' design and very comfortable both in hand and in pocket. GEC hit a home run with this one, imo... 'nuff said!
The GEC-made Fruitport is probably the superior folder of the bunch, truth be told. Excellent fit & finish, fantastic convex edge (thanks to the folks down at Bark River; far better than any GEC factory edge I've received to date,) fits my hand well, and is comfortable to carry. Comes with a very nice leather pocket slip too! On the days when I can't decide between a larger or smaller folder, the 3.75" closed frame of the Fruitport is a perfect compromise. Pick one up if ya can; you won't regret it!
The #61 is a good knife. Nice and slim in pocket, but it's heavier than the others due to the big bolsters. Unless I carry it in a slip pouch, it tends to sink to the bottom of my pocket and lays horizontally. I like the secondary coping blade but it has a pokey corner that I feel when using the master blade. Not sharp, just distracting. For some reason, the master blade is giving me a bit o' trouble setting the edge. I'll have to set aside some time to put a proper edge on it; once I do, I'll probably carry it more often.
The #25 is a great little wharnie! I also have an Easy Open #25 sheepsfoot in 440C. Both are spectacular secondary carry knives but I'd certainly be comfortable carrying either solo for EDC.
Hope this helps ya make a decision, fella!
-Brett