I love the Titan. The jump is similar to warlock but is faster and more aggressive. Being a Defender really gives you a feeling of responsibility to the team and knowing how and when to use your bubble can instantly get you props from your teammates if done right or even perfectly. Definitely learn what your bubble can do. There are some tricks I learned that alot of Defender's don't even know. It's very flexible. As for Striker is has some of the best grenades of any class. It has a pulse grenade which is equivalent of a solar grenade, but not as pretty. A flashbang grenade which is great on Wizards and Knights shooting at you. I use them to help me solo nightfalls or to blind the Gatekeepers on Crota bridge to help the team. And the infamous lightning bolt grenade which, if placed correctly can devastate anyone and is probably the best pvp grenade. If placed wrong it just looks silly and you won't get many kills. And of course using Fist of Havoc when surrounded with no health and about to die is never more satisfying. Also has the best looking exotic helms.