I haven't heard a lot of his scores, but I decided to buy IJ & the Crystal Skull and I enjoyed every track. I bought The Force Awakens, but unfortunately my home CD player does not like the CD and my car stereo does not represent orchestral music well - any quiet parts are inaudible partly due to road noise, etc.
I don't own any other IJ soundtracks, so I can't compare it to those, but I recognize the themes from the prior films and the new ones are nice.
The Crystal Skull theme may be similar to Kylo Ren's theme, but I would need to listen back to back.
One other thing - my friend and I loved the Jurassic Park score and bought The Lost World score when it came out. He didn't really like it, but I went ahead and bought it anyway. The LW score is never mentioned, so it must not be popular. I thought it was disappointing at the time. I'm not sure I have seen the full movie again since I saw it in the theater.