It obviously depends on a ton of factors such as opponents, stack sizes and position, not just the board texture. Deep-stacked, these hands are surprisingly quite a bit better when suited - but even then ALL of these hands can lose you a lot of chips if you aren't careful.
Generally speaking, AK is a strong starting hand and you'll usually want to be getting value from this hand - if the flop doesn't help you though, you should be careful and not call off huge bets with the hope of improving - you still only have Ace-high if you don't improve. Also, AK is typically in a coin-flip situation with any pocket pair. I am not a math person by any means, but from what I've observed, AK is usually just a hand that gets one pair with a strong kicker (maybe someone with a poker program can verify this or correct me if I'm mistaken).
AQ plays virtually identical to AK except that now you have to worry about AK hands beating you too.
AJ is considerable worse than AK or AQ in deep-stacked poker, but it is still a solid hand at lower stack sizes - especially if suited again due to the potential for hitting the nut-flush (although still unlikely).
These are just my observations on these hands, but perhaps someone more informed may enlighten us both on the subject