I started on the 16f690 ...for no other reason than it came bundled with the PICkit2 starter kit - but as many have pointed dout it's not really a beginners chip....whilst more features is good from a 'value for money' perspective, the added complexity of register settings, can really inhibit you doing simple stuff in the early days.
So while you find your feet I'd recommend a simple PIC (alas, I'm past those early days, and never used a simple PIC... & therefore have no specific recommendations to offer wrt a simple PIC!)
What I would say is once you do get in the swing of things, to leapfrog the likes of the 16f690 and similar (which are a couple of years old now) and go with the bang up to date ICs, which are - on the whole - just that little bit nicer to work with....I'm presently having great fun with the 12F1822 & the 16F1824 (of which there are numerous similar variants....16f1828 etc depending how many pins you need).
I also find this selector invaluable...
http://www.microchip.com/productsele...tSelector.html
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