I'm not that keen on Eric Serra's music. Part of that may be that the synthesiser sounds are very eighties. I found The Big Blue soundtrack grated similarly.
I bought the DVD ages ago, but it had been sitting on the shelf waiting for me to find the time. I started off watching with the English dub, but this was too annoying, so I switched to French dialogue plus English subtitles. My French is very limited.
The film was remade in America as Point of no Return (I think it was The Assassin in the UK), but I've not seen that.
One of these days I'll get Leon on DVD, but I fancy the US version that has extra scenes and have never seen it cheap.