Hi Whandsy!
I prefer fresh, selfmade Garam Masala, regarding flavour and quality. Authentic (ayurvedic) Garam Masalas are quite strong, and can taste somehow "odd" if you are not used to it. I always try out new recipes (and there are dozens, like Delhi- or Punjabi - Garam Masalas), but I'm quite happy with the mix I use at the moment. Before that, I used a traditional, very aromatic Garam Masala (Madhur Jaffrey's) - and always, only a pinch. Very strong stuff.
Greetings!