Asfar as my personal herp experiences go:
LP geckos are easy to take care of generally friendly but can be less than enthused, and are rather easy pets. Won't typically bite or be fussy in terms of eating.
As for bearded dragons:
Much smarter than people give them credit for. Can seem rather lethargic at times but they also go crazy.
If you're truly interested in a lizard and don't have many limitations, I'd reccommend a Black-Throat Monitor. Exceptionally docile, smart, loyal, and are truly breathtaking once you've raised one. They get a bt large so if you have other pets it can be a problem. However, they can be trained to an extent, are pretty dam smart as far as monitors go, and are docile to boot. Pretty cool lizards.
For the love of god, don't get a Croc monitor. Those ****ers are nasty, bitey, and their teeth are wicked. I had a guy tell me a story once about how he nearly bled out from a 3 month old from a bite to the wrist. They're aggressive, easily agitated, and generally regarded as pricks. Black throat monitors, not at all IMO