I love the Hound mold. he has flaws, but I love that figure-I am biased though since he as always been my fave character.
I think the Seeker mold is top-shelf, even with the possible problems with the mold being overused. It is a must have, IMO.
Sideswipe and Sunstreaker are pretty darned awesome-either one is really good. I like Swipe, personally.
Honestly, it's hard to go wrong with any of the Deluxe figs.
Blades is a repaint, but I really do like that Voyager figure a lot. I can't say I love any of the Ultra class figures except for Countdown, and he is a repaint as well.