With platinum prices so low I've been looking at completing my fractional APEs, I've already completed the 1/10 oz and now working on the 1/4 oz. Here's my 1/10 oz set.
Nice set! Consider looking into collecting the proofs as well. They have different designs every year (with certain designs being some of the best work the US Mint has done). And best of all, you can sometimes find proofs at premiums similar to the bullion platinum eagles.
Took awhile but I found some proofs in the back of my safe, these haven't seen the light of day for a long time.