Many years ago I had an MGB. It was a fun summer car. I was younger and appreciated the wind in my hair and the sun in my face. The noise, lack of luggage space and the roof that dripped in the rain (just to the left of my crotch) didn't bother me. It was part of the "charm". I would see someone in an MGB GT and wonder why in the world they would drive an MG with a steel roof.
I also began to like the idea of being able to have a conversation at a normal decibel level with the person sitting next to me. I started to like the idea of having enough luggage space for two overnight bags, just in case I wanted to go away for the weekend with the person sitting next to me.
I began to really like the MGB GT.
Inside, the dashboard is the same as the MGB. Behind the front seats is a little flat-folding rear seat. It is roomy enough for you to bring your dog on a trip, but not really human inhabitable. Behind the rear seat (and on top of it, if you fold it down) is a surprising amount of cargo space.
With the steel roof, the MGB GT weighs a couple of hundred pounds more than the roadster. Even with that extra weight, it's slightly faster than the MGB because of its better aerodynamics. The steel top also stiffened chassis (which was already very good, especially for a convertible) and the car handles better than the roadster.
MGs are not as fragile as many other older sports cars. Parts are plentiful and not overly expensive. If you don't like working on your car yourself, there are still plenty of mechanics around who specialize in British cars. All-in-all, an MGB GT is a very easy classic to own.
If I ever buy another MG, it will be an MGB GT.