I started collecting as a child, holiday money and any odd coins from circulation. I
inherited my grandfathers collection of coins from his World War II army travels and I also bought a friends collection for £5 birthday money (an old tin full of coins)
From there I started putting together a date collection for English coins and a general collection of foreign coins.
This developed the interest and when I started working I started buying silver proof sets etc.
I myself travelled extensively and in every country I tried to get a date collection and all the types of banknotes.
I diversified into Greek and Roman ancients (made a nice type collection) and have come back to banknotes.
I still try to collect all signatures and dates from circulation but I am very general in my collection which is big since I never sell anything (if I have multiples of something I might swap them but I never get rid of anything unusual)
I therefore have a few thousand coins of relatively little value (in folders for each country and in date/denomination order) a few folders of low value banknotes and a couple of high value albums (all the British signature types/denominations, all the American denominations/types by seal colour and design variations) A folder of ancient coins, 3 boxes of bullion coins (1 ounce silver types) some unusual bits (boxed items like Maundy sets, soveriegns etc)
Not sure what type of collector that makes me, but I have phases but seem to come back to it regularly.