Though I personally do not own a lizard, I have been around a few. My preference would be the bearded dragon, but there are so many to choose from, that reading a little about them all might be more beneficial
I did a search for you and found a few good websites.
.
==================================
Bearded Dragons make some of the best reptile pets. They reach a manageable size of about 18-22 inches and only require a 40-75 gallon enclosure.
Getting a Bearded Dragon is a serious commitment. They can live from 5-12 years in captivity. We had Eddie for 10 years before we had to have him euthanized in 2005. He was the oldest Dragon my vet had ever seen at the time. Eddie and Bisquik's page has relocated here.
Bearded Dragons do require a few very important things to remain healthy.
Proper heat gradient from 100 degrees F down to the 70s
UVB light in the form of a fluorescent light, Mercury Vapor Bulb or unfiltered natural sunlight
An Omniverous Diet with the proper calcium/phosphorus ratio
Fairly large enclosure from 40-75 gallons....more info to read at the link below...
http://www.reptilecare.com/Bearded.htm
Leopard gecko care sheet, gecko information, gecko pictures gecko links
Leopard Gecko Care Sheet
By
Gecko District
The most popular lizard in America (Eublepharis Macularius)
The Leopard Gecko is originally from Pakistan, India, and a few other countries in Asia. Leopard Geckos are terrestrial (they live on the ground) and they are nocturnal (active at night). They prefer temperatures between 82 and 88 degrees all day and night. They grow to between 8 to 11 inches. Leopard Geckos are available in a wide range of colors and patterns which are the result of selective captive breeding. These include albino, ghost, striped, jungle, leucistic and high yellow. These colors have been made possible through selective captive breeding. Leopard Geckos make wonderfull pets for almost any responsible person. Leopard Geckos also make good long term pets. They can live over twenty years. Never grab by tail it will break off.
http://www.geocities.com/geckodistrict/leopard.html
Here below you can learn about most of the different geckos, this site has a drop down tab/window that when you slide your cursor over it, it provides a list of them with photos too.
http://www.daygecko.com/