Leopard geckos are the ones which look like they are smiling. Crepuscular rather than nocturnal. Ours was VERY cuddly.
Crested geckos are far more skittish and will lose their tail, definitely. They are fine without it, but, it was traumatic at the time.
Both need a vivarium and a heat pad with a thermostat. Both eat live food, though crested need repashy daily too. Cresties are from rainforest so need spraying at LEAST twice a day. Leopard's are desert, so don't need spraying.
Tortoises are as good as any other reptile - if you get the housing right they are fine. Get a tortoise table and a UVB light, not a vivarium.
All of them need supplements of calcium. If you don't get the husbandry and the vitamins right then the animal will get sick - find out where your nearest exotic vet is. It can be expensive, it's MUCH cheaper to do forums research and figure out what you need in advance.
Don't get a chameleon. Just don't. Too hard
Dragons are good too, we've never had one.
Snakes are easiest of all - get a corn snake, eats a mouse once a week, needs clean water and a heat pad.
Have a look at your local RSPCA - they are always having reptiles handed in. Advantage of that is you get an adult which is vet checked, you know it eats and sheds. Many of these animals live for 20+years - do your homework and DONT get a baby.
The advantage of reptiles is they don't care if they are handled or not - whereas a hamster goes vicious. Reptiles like the heat from your body so most don't mind being handled (though crested geckos will jump rather than sit on you like a snake/leopard/dragon)
Live food - order online to be delivered to your house. Get a plastic tub to put them in and feed them vitamins and calcium on greens before feeding them to the animal. We just chuck them in so the animal has to hunt them.
I was like you, VERY reluctant. We now have 7 vivariums in my house. I remain reluctant, but, I've got used to it, and the kids absolutely love their weirdo pets.