I'm a fan too, some didn't like his tone that much, but I enjoy the gypsy-like expressivenes and the at times creative approach, such as in the phenomenal Debussy violin sonata with Argerich (that might be quite 'freestyle' compared to the composer's intentions).
The 3CD Gitlis box from Brilliant, mainly with concertos, would be absolutely essential even for a very, very small classical collection of mine too.