Last year in march, I went to see Judas Priest live in Hartwall Arena (a big Ice-hockey hall), well there were only like 4500 people there, out of something like 11000 seats.
In Flames was the warm up band, they were ok, I don't really dig they're music, and the bass was too loud, you could barely hear the guitar etc.
And onto Judas Priest: the atmosphere was great, they played well, and they had a great scene settings, with high shiny metal'poles' with red, blistering, glowing band symbols inside, elevators, stairs, etc.
The only negative things were: they arrived 1,5 hrs late, it was a bit annoying when you didn't know when they start to play, so you couldn't really go to the toilet, get some food etc, lol. Also Rob Halford's voice wasn't as 'high', squeaky as it was before (on albums, dvd's) , but I guess that's just because of him ageing.
I did also go to a small festival last June, there were some great finnish bands (who sings in finnish), which I doubt you've heard of, but also some more famous 'English singing' bands, like The 69 eyes and Negative, which you might've heard of, they were good. The variety of food stalls there was surprisingly big, that was good.
Also when I think about it, I did also see The Rasmus in the Olympic stadium (at a youth school athletic contest), in 2002.
They were good, and quite different from today, not as famous, the lead singer had yellow hair and they weren't as near as "black clothed" as they are today. Also they had only done one album back then.
This year I'm going to see Metallica, Bullet For My Valentine (same place)(If I don't sell the tickets, as I could get a nice amount of money for them), Iron Maiden, maybe Gary Moore and Whitesnake. I could still go to see Santana if I'd like to, but I don't really have the money to get everywhere.