I agree with Robert if you're speaking about Leopard Geckos. I had leopard geckos before and I currently have a crested gecko and a beardie. I want another leo though, but I need to make room for one! I house them in my room because my mom hates seeing them around the house.
Leopard geckos are the easiest of all the geckos to keep. Tokay geckos like to bite, so don't get those. Crested geckos get skittish and their tails don't grow back.
But, leopard geckos are easy to hand tame and they stay small. One leo can spend its life in a 10 gallon, making sure you have a warm side and a cool side. They do have high day temps b/c they are from a desert-type environment, but they do not require UVB/UVA because they are nocturnal. If you get a nocturnal lamp, then you will be able to see them at night. Some come out a bit earlier when they hear you come and they want to eat. They LOVE to be handled after you get them hand tamed. They eat once a night at 12-18 dusted mealies OR 6-10 dusted crickets at a time, depending on which you feed them - Compared to the bearded dragon's feeding of 2x a day with AT LEAST 10 dusted crickets each greens. They need high basking temps, but Rob already explained that so I won't get into it. Except, with the UVB/UVA lights, you must change them every 6 months because the rays decrease over time, which you don't have to worry about with leos - keep the bulbs til they go out.
When leopard geckos get scared, they drop their tail. It grows back in 2 weeks, but make sure you feed them well making sure the calcium supps are powdered on their food. They'll be back and up in no time! Bearded Dragon tails don't drop. Leos come out at night and beardies out during the day.
I hope some of those help. If you need anything else, I'll be around! There's also the leopard gecko forum too!
I am currently in the process of developing care sheets for Leopard Geckos, Crested Geckos, and Bearded Dragons for my own site as reference to those who need it. It's pretty much a compilation of different things I've learned through the research I've done in preparation for the reptiles and through the experience I've had so far.
Good luck in your decision making! Take care 
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0.0.1 Bearded Dragon (Cookie Monster)
1.0.0 Crested Gecko (Vas-D)
0.0.2 Fire Bellied Toads (Norman & Forman)
0.0.2 Goldfish (Lenny & Carl)
1.0.0 Black Lab / Pit Bull (Mikey)