Agreed.... I had Sid for over a year before I found out about appropriate housing, heat mats, humidity and the like - and he is a beautiful snail... He grew no end with only his cuttlefish too...
So I would say A Fulica - they are readily available, hardy, simple to keep and look after - so long as you keep their tank moist and around 23 degrees celcius - you can get cheap fishtank thermometers to measure this!
Welcome to the additcitve world of GALS - I started with 1 - that became 3, then 5, now 9.... and soon to be 11!!!
Fulicias are really the best for you if you want a hardy one, and i think there the easiest to look after i dont even have a heatmat so my tank is always about 18-20 and humidity about 90, but i will get one soon, Goodluck!
Achatina Reticulata albino were my frist snails, easy to keep, easily pleased and very very active, to be honest most snails are active between 18 - 28 with the majority preferring around 25 with reasonable humidity. this is just my experience some may disagree.i never had a heatmat for ages and they were fine and still are. But hey they are all cool and whichever snail you choose im sure you will end up with a great friend Ade
I kept fulica for a few years and they are very hardy and easy to please. they eat almost anything!
Like the poster above I now have an Albino Reticulata and he is the most active snail I have ever had. He is about 6 inches now and I honestly don't recall seeing him retracted into his shell since he was about an inch long, he never stops!
I have a heatmat but I rarely turn it on in the spring, summer and autumn and only for an hour or two a day and at night-time in the winter. Reticulata, fulica, and most of their derivatives will live quite happily with no heatmat in a warm house but you should have one just in case. They will retract and the skin sometimes look more stoney grey when they are suffering the cold. Obviously that doesn't really work with albino varieties!
If you have a tank or a vivarium you would do much better to put a giant, gentle, touchable and sometimes comical snail in it than a load of cold brainless fish! lol