Reluctantly, Air. But it needs to be cleaned up regularly and have more "oasis" themeing added. With a coaster that is designed to look swish and modern, any grime sticks out lack a sore thumb and really brings the ride down.
Oh yeah, it really is starting to look horrible and grubby, and in 5 years time unless something is done it'll look really shabby. Air is a real "millenium" coaster if you get what I mean. In the late 90s/early 00s it was all the trend for things looking very "space age" and "technical" even though they didn't really predict it would date quite quickly. Unfortunately, Air followed this trend, so it's important to keep it in good upkeep.