Pros: they are some of the most loving creatures I have ever encountered. They run to meet us at the door, purring and head butting. They snuggle every night. They never want to be far away. They love indiscriminately. I've never shared my home with creatures like SV's before. They make me laugh loudly every day, they remind me not to take myself so seriously, and they keep me in check with materialism (come to Jesus moments usually involve them chewing my newest jimmy choos -Jarvis likes the way the leather tastes - or shredding my new clothes when they jump up to be held). They do make us be clean- dirty clothes disappear if left on the floor, and food on the counter will be gone by morning. They force me to use Tupperware.
They are playful. They are fun. They are funny. They are big love bugs who just want to be with you all the time. At least my three are.
Cons: they can be destructive. They can be persistent at inconvenient times, or with dangerous things (D keeps tripping the breaker by biting the apple chords). They really do need a lot of activity. They are not always bright. Mickey and Jarvis both tried to eat my litigation binders last weekend (I had a trial on Monday) and Jarvis kept putting his paw in the hole-punch. They are not safe around candles (keep getting to close and end up with singed whiskers- now candles in my house are dust collectors). They will make you homebodies, you won't want to leave them. And you will miss them terribly and plot with your spouse to bring them on your next trip when you do go away
The cons list isn't really a "cons" list for me. I wouldn't trade the nicest shoes or the most perfect house in the world for them. But you have to be willing to accept that your kitty may just shred your shirt when the firetruck comes down your street for the first time, or that you may get a cat who likes to wake you up every morning at 2:30 on the dot because he wants to be held with BOTH hands, or that you may get a baby with a sensitive stomach who comes to cuddle when he doesn't feel well and then throws up all over you by accident (sheets are in the wash as I type). My only real con is that they do stupid things and scare the daylights out of me. And that is only because I love them so much and I worry about my silly boys accidentally hurting themselves.
As Bridget said, they are not pretty ornaments- but they sure are a lot of fun