I started playing when everyone was hyped about Yu-Gi-Oh, Pokemon and Digimon TCGs. Still play it, has kept me some friendships alive.
Something like once a month me and a bud of mine visit our "local" hobby shop and check out the new expansions and play against other people.
If you want to get better, stick to one single deck and challenge various people with different decks, from that, you just keep going and improving. It's really hard to keep up with MTG unless you're taking it seriously. By the time I get enough money to have a taste of something new, something newer shows up.
Anyways, I love this game and I can easily say it's right next to Brikwars as my favorite games.
You'll usually see me playing with a goblin deck, a red/black destroy or an experimental red/blue. I went to a tournament last year, won a FOIL Nightmare and a Ursa's Legacy deck, not bad eh?