Ahhhh... Ronnie James Dio.... He had a HUGE impact on me musically. Really tuned into him in '80-81. I had heard and loved H&H, but really didn't know or even really appreciate Dio. Then I picked up a copy of Rainbow On Stage, and the rest is history! NEVER...had I heard such a powerful vocalist. The sheer strength and timbre of his vocals on that album...WOW. Still I'm Sad, the classic mellow Yardbirds song turned into a brain melting assault. Kill the King, Mistreated, Greensleves, and the pinnacle...Catch the Rainbow. After that I was hooked on Dio until the release of Dream Evil. He was losing me at Sacred Heart though. Someone in this thread brought up a good point though, I think he really benefited with the powerful songwriting of Blackmore and Iommi. Something that I think was missing in "Dio". Like everyone mentions, HD and LIL are awesome albums for sure, but it drops off from there for me. Another indicator for me, was Dehumanizer. I liked that album far better than anything he did solo from '87 on. Again, I guess it's the Iommi/Butler songwriting that might have been the difference.
On Stage, is a top 5 album of all time for me. "Rising" is awesome, with the gems being on side 2 like everyone has mentioned. What a frikken line up! Blackmore, Dio, Cozy Powell, Jimmy Bain and Tony Carey...wow... To a lesser degree LLR&R and RB'sR are also great albums. I remember around the time of Last in Line I reached back into the Elf albums and honestly, they didn't do much for me. At the time though I was pretty hell bent for metal. I might have to give them another spin now that my tastes and perspective have broadened. I mean something was there in Elf to get Blackmore to recruit him.