I'd better start by explaining that I'm no expert. I have been playing warhammer (and occasionally other things) for at least 10 years now but when it comes to winning anything it's still more likely to be luck than any tactics on my part. However, I do believe I am improving in gaming and modelling but that's not for me to say really.
I was going to go into some detail about how I'd got into the hobby but that's not really necessary here. I'll just overview:
I started with Warhammer Fantasy: High Elves (first love/go to guys)
Skaven (Skavenslayer by William King really set that off)
Ogres (Very recent, mainly to build up my modelling skills)
40k was my second system: Pure Grey knights (old Daemonhunters codex)
Space wolves (off and on)
I joined 40k about half way through 5th ed - feels very strange now that's coming to an end - and started off with Pure Grey Knights and moved into Space Wolves because of the idea of viking-esque heroes really appealed to me.
Now the intro is over I can move on.
Again, stay tuned.