The good Reverend nailed it.
"Mr. Scary" was an instrumental that had me jumping around in my room as a teenager, trying like hell to learn. For 80's "hair metal," his phrasing was unique. He could do the neoclassical stuff but didn't sound like Yngwie. He could do fast, bluesy stuff but didn't sound like Eddie. I also liked that he, to this day, hasn't stopped trying to improve his playing.
Back for the Attack came out at a time when I was trying to get serious about playing guitar. My teacher made me try to transcribe a tune into tab, and I chose "Kiss of Death" from that album. For me, Lynch's playing represented a near perfect blend of melody and aggression.
Listening now, some of their stuff might sound dated, and Dokken had a tendency to get nasally with his vocals. But man, did those guitar parts and solos smoke!
When you're in a "shreddy" mood, I highly recommend listening to "Mr. Scary" and "Kiss of Death" for Lynch in full furious 80s hair metal glory.