In reply to brownie mike:
We have 4 tortoises (my wifes) ranging in age from 12 - 100+ year old, the 55 year old hatched on her hand when she was a kid. 2 are currently hibernating in a box in the shed and the other 2 living under the woodburner, they like that, for different reasons these 2 can't hibernate for long.
They are a surprising amount of work and need looking after and feeding properly, a correct and varied diet is essential. I built ours an outdoor pen (with netting roof to keep the buzzards/goshawk off) with a kennel for night. I hate seeing them in aquariums and small indoor hutches, they are active creatures and need some space. They definitely have personalities and different ways about them also food preferences (don't just fed them lettuce, in the wild they eat everything including meat - if they find carrion). Females are probably easier than males, but I wouldn't buy one of each until you know what you are doing.
Bear in mind if you buy one for your girlfriend, it will also be for her children, grandchildren.........and longer!!! The plus is that if they hibernate you may have 3 months off 'tortoise care' every year!