This is a course map I really like and it's a map pretty much everyone can do!

http://gamebanana.com/css/maps/141529
mg_fred_v4

It's an obstacle map and takes about 35 levels!

And as PTK already suggested before:

http://gamebanana.com/css/maps/163179
mg_hideandgoshoot

And the previous sort of version of it:

http://gamebanana.com/css/maps/57085
backalley_run_v2

Maybe Wipeout can be removed? By playing on the server I noticed people generally really dislike it!!