It's hard to say because I've been to a lot of concerts especially the last 5 years, about 5-10 a year. Different front men are completely different types of shows.
Alice Cooper is completely theatrical
Eddie Vedder is very intimate
Billy Idol is a blast
Axel Rose live was full of energy and watching November Rain live was incredible.
Neil Diamond wasn't as boring as I thought it was going to be
Tom Petty slowed down and very chill
Fleetwood Mac, honestly good show, but the front people really kind of blah
ZZ Top, old guys with beards
Chris Cornell excellent
Trent Reznor (Spelling, NIN)... surprisingly not that great, honestly their show was boring
Vince Neil entertaining, but not as entertaining as Tommy Lee on a spinning drum stand
Greg Allman surprisingly boring
Candlebox lead singer (can't remember his name was very entertaining and was high as a kite)
The Doobie Brothers were surprisingly entertaining
obviously I forgot a few... but its' what my wife and I like to spend our money on.
Those I would or already have paid to see again:
Axel Rose
Billy Idol (might be seeing a second show soon)
Eddie Vedder (4 times already)
Alice Cooper (3 times already)
Chris Cornell (getting tickets to second show)
Next for me:
Marilyn Manson and Smashing Pumpkins