Hi Casey, you have a mix of quality and styles here. I find the 3rd image of the Bali keris to perhaps be the best blade among them, but that's pretty subjective. Most of your pieces could use some restortation of some sort if you are into doing that with your collection.
The keris singo (lion) looks like it might be interesting. It's hard to judge with your photos because they appear to be on the point of pixelating, making it difficult to make out detail. It would also be nice to see the entire blade of your keris as one can not get a feel for the flow of the design in the entire blade. This is an essential part to the overall appreciation and assessment of a good keris.
Your friend has started you off witrh quite an interesting collection. Few of us ever got such a nice opening opportunity. Congrats! I look forward to seeing more of your new found passion. You're hooked now.
Is there some reason why you friend sudden gave you these. Has he given up collecting.
