Hmm... Did some empi last night. Could vaguely remember it from the old days ago in the dark ages, but picked it up again very quickly.
With the exception of the bastard jump (thankfully I will not need empi to grade for a looooong time), I found it reasonably easy to pick up.
As GKR uses a combination of go ju and shotokan katas, do people find ones of certain styles easier to learn than than ones traditionally accredited to another style?
For example, Bassai Dai and Empi are very different from saifa and seiunchin, yet I would say I can learn the Bassai dai/empi type kata's more easily than I can remember learning saifa, and recently starting the struggle with seiunchin.
I've possible got my linerage wrong here, so correct away, but that's what I've been thinking.

Other possibility is of course that seiunchin is above my grade kata, and in several classes I attend, I am the highest belt, which makes trying to learn the finer points of the kata rather difficult.
The class I went to last night had several brown belts, so thus my group did the empi work.
Perhaps certain people/body types are more succeptable to learning certain kata's faster than others?
What do you guys think?