roller coaster

[Anonymous]

Are these all OK and natural?

1. This is the/my first time I have enjoyed [a/the roller coaster, roller coasters].
2. This is my first time to enjoy [a/the roller coaster, roller coasters].

Thanks.

[Rusty]

Are these all OK and natural?

1. This is the/my first time I have enjoyed [a/the roller coaster, roller coasters].
2. This is my first time to enjoy [a/the roller coaster, roller coasters].

Thanks.

1. This is the/<strike>my</strike> first time I have enjoyed [a/the roller coaster, <strike>roller coasters</strike>].
2. This is my first time to enjoy [a/the roller coaster,<strike> roller coasters</strike>].