We have had three. Our first lived until she was 15 and did not visit the vets until the last 6 months of her life. She was a very odd dog, hated children and loved women.
When she was put down we bought two sisters from the same litter. Very different personalities but both loving dogs.
Jess was put down recently but Nell is still going (turns 16 in March).
They have cost me a bloody fortune though. They have both been incontinent since being spayed, one tablet a day.
They both have/had dry-eye (quite common) and need optimmune eye ointment each day (circa £35 month).
They have both had skin problems (this week the vet has agreed to keep Nell on permanent antibiotics to keep it at bay).
We had the two before we had kids but they both love(d) the kids to the point of obsession.
Take what you want from my ramblings. The ailments are pot luck with pedigree dogs and I guess personalities are pot luck with any dog!