
I have had Leos +15 years and absolutely love them!
Generally I would say they are pretty easy going and very trainable.
I have tried most doggy activities with mine from flyball, agility, water rescue and obedience to tracking/nosework, search&rescue etc...
Many people do not realise that Leos are not coach potatoes, they are happy to chill and relax but if you want to do things with them you can! This is something I like about the breed, they are very adaptable I would say.
Even the ones that are little challenging at the teenage age usually calm down and settle when they mature.
Most I would say are quite soft dogs compared to many other breeds.
Sensitive souls would describe many Leos pretty well...
The ones I have met with problems are usually from being soft than dominant/hard, very soft dogs being put on the spot and reacting to the pressure...
Some males can have a dominant strike to them but most are gentle giants.
I have only ever had Leos myself but have mixed/trained with loads of breeds so my opinions are based on this...
Coats can have different textures and some soft coats are pretty challenging to look after(at least compared to the "correct" texture).
Trying to remember back years ago I seem to think the breed standard (in Finland where I came from) used to list drooling as a fault.
I have to say I have not met many Leos that drool like other molosser breeds can... This was actually one reason why my mum let me have a Leo and it is why I still remember it being mentioned in the breed standard :) (we had a relative with a Goldie that drooled bucket loads and my mum hated the stuff!).
Lips are supposed to be close fitting and not open from the corners which I believe should mean a dog that doesn't drool loads?
Saying that many Leos make up for the non-drooliness by carrying the last mouthfull of water around the house everytime they have a drink!
Often they come and put their head on your lap, smile and release :)