IMO you need a sports car, such as a Boxster S, Cayman, Exige etc etc.
Quoted for truth.
If you want a car that feels an 'event' or special each time you drive it, then a saloon or hot hatch is not the thing.
After having the MX5 for a year now and a brief ownership of the S2000, a hot hatch or saloon just seems dull in comparison, unless I really needed practicality or a lot of space, or upped my mileage significantly where I found the lack of refinement started to grate, I wouldn't want to go back to a hot hatch or saloon now.
Thats not to say I'd rather own my MX5 than a C63, for example, of course I'd rather take the Merc, but there are times when the Merc will be just another C class. This is a good thing when stuck in traffic, or you want some refinement for a long journey. On a twisty B road though....this can be a bad thing, its size goes against it and it will always feel a bit inert and heavy if you chuck it around, regardless of how fast it will actually go or what a fantastic noise it will make. A sports car should always make you smile more.
A sports car will always feel that little bit bit special, just by virtue of the low driving position and driver focused interior...although you will have to make some compromises in terms of practicality, refinement, comfort and so on. If its driving enjoyment and something special you want then something based upon a family hatchback or a saloon may occasionally appear lacking no matter how much its breathed upon....where as something purpose designed as a drivers car, rather than one adapted to be that way, should not.