Reptile & Amphibian Forums

easy/moderate to tame
approx. 3' stt
easy to house-break
interactive personality

I'm sorry i dont have much info on them, but iguana sounds about right for you. ON the iguana forum you are sure to find someone with a free-roamer. The problem is, some don't tame as well as others and they get around 5 feet. Sorry! PHEve has a a a free-roaming collared lizard, Kong, but i dont know if he is housetrained or not. I hope others answer this post, as there are a TON of lizards out there, and i am just an amateur at this herping thing.
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Paullywog

If it has scales or smooth wet skin... snatch it!!!

I think a Blue tongue skink fits all of those (maybe smaller than 3' though)

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1.0 Indonesian Blue Tongue Skink (Don)
0.1 Irian Jaya Blue Tongue Skink (Sausage Girl)
0.0.1 Tanimbar Island Blue Tongue Skink ( Spunky Sebastian)
0.0.1 Ornate Uro (Spike)
1.0.1 Green Tree Pythons ( Male=Floyd, Baby= Verdi)
0.1 Western Hognose (Piggy)
0.0.1 Egyptian Tortiose(Tank)
0.0.1 Sonoran Gopher snake ( Toro)
0.1 Albino Leo gecko (Sasha)

Handled daily they become real sweet. I love my girl.

Also there is bearded dragons, a bit smaller than you said.

water dragons, many different species, just go searching and read about species you like, see what suits you the best, and what you can best care for.

Let us know your decision
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Eve / PHEve

Some EXPERTS & ADVANCE HOBBYIST have succeded with black & white tegus. They dont get very tame, but that doesnt mean its impossible. They can do what tegus normally do, but with some interaction, they MAY tame to some degree. Whatever your choice is, lets hope 4 the best.