right now I have 2. A phil & teds sport which is awesome for walks & was great when DD wanted to sleep while we were out with both kids. I also mave a maclaren ryder which is so light & easy to fold (can do it one handed while holding DS) I use this for shopping & any quick trips anywhere. I also travel withit because its easy to fold when I'm on my own going through the security at the airport & can take it to the gate for boarding easily.
We also have an emmiljunga which is still at XH's place. That one gets its use when the kids were newborns (awesome with bassinete attatched) but it takes up so much room & is so heavy for everyday trips.
I have been through heaps over the years & love the ones I've now got.