I would advise you not to go looking for what others think you should do but to start looking at this from a 'problem oriented perspective'.
Find something that you would like to have but that is not currently available and then build that, that in turn will decide for the platform and associated toolchain.
It is much better that way because you can't really make the case for what is 'better' for an aspiring programmer, web programming, tablet programming or any other 'kind' of programming per se. It all depends on what you want to achieve and programming is just a means to an end.
Also, under the hood all 'kinds' of programming are essentially equal (in spite of many religious arguments to the contrary), it's in the end just a way to very specifically tell a computer what you want it to do and in that respect any programming will serve as a way to get better at every other kind of programming.
The more you do it, the better you get, just like with every other skill.
Find something that you would like to have but that is not currently available and then build that, that in turn will decide for the platform and associated toolchain.
It is much better that way because you can't really make the case for what is 'better' for an aspiring programmer, web programming, tablet programming or any other 'kind' of programming per se. It all depends on what you want to achieve and programming is just a means to an end.
Also, under the hood all 'kinds' of programming are essentially equal (in spite of many religious arguments to the contrary), it's in the end just a way to very specifically tell a computer what you want it to do and in that respect any programming will serve as a way to get better at every other kind of programming.
The more you do it, the better you get, just like with every other skill.
Good luck!