Hi all! I'm new round these parts, though I've been lurking for a while

I did a quick search but couldn't really find a discussion about this already existing. If I missed a thread, mods feel free to lock/merge

I have 2 questions:
1) Is it better, generally, to have a repertoire containing a few pieces by a wide range of composers, or a repertoire of fewer composers but more pieces (perhaps entire output) from those you've chosen to "specialise" in?
2) Which do you personally prefer?
Now, I know it's very important to have great familiarity with a wide range of styles and eras, but I can't help but think that if one feels a strong affinity with a select few composers, they should concentrate on those works. Life's too short to make music you don't like after all

Anyway, the reason I'm asking this is because after reading a lot of Bernhard's posts about practising schedules, I made my own list of 100 pieces for 5 years (with great difficulty narrowing it down). It is dominated by Beethoven and Bach (my two great loves

) who take over half of the list between them, with Schumann, Chopin, Debussy, Mendelssohn and Fauré making up most of the rest. There's also a smattering of video game music and film scores, because that's always a lot of fun. I'm slightly concerned that my list isn't varied enough though

Should I limit my Bach/Beethoven diet to allow for a more varied repertoire, or stick with those composers I know and love best? I'm considering a balance between the two - giving myself 10 years to cover all the Bach and Beethoven I want so that I can add in composers I don't know very well.
For what it's worth, I've been learning piano for almost 6 years now (going to sit Grade 8 ABRSM in winter) and I've only been getting truly serious about building a repertoire over the past couple of weeks. I'm a little old for a pianist (20) as it's my second "real" instrument, but I really love the piano more than any of the others. Up til now I've been pretty lazy with the exam system dictating the pieces I learn (quickly forgotten in most cases), but I'm more than willing to make up for lost time.

Any thoughts on this? Replies of a general nature are appreciated as much as opinions on my personal circumstance. I hope this will turn out to be an interesting discussion!