Which tour bus is the best for a sightseeing tour of Vancouver?

The people aboard the Big Bus seem to be having a happier time than the other line.

I really enjoyed Gray Line when I did it.

There are two types of tours: hop on, hop off tours, and regular sightseeing tours.

Big Bus and Vancouver Trolley do the hop on hop off tours, where they do a circular route around downtown and it's up to you if you if you want to get off the bus and explore on your own.

Gray Line, Land Sea Tours, and West Coast Sightseeing do regular tours, where you stay with the group for the 3-4 hour tour, or however long it takes.

Thanks. I think I will do the hop on hop off bus. Sounds like fun. I need to park the car somewhere along the sightseeing bus route. Anyone knows of a "reasonable" parking place?