I use LA to piss off the players that try to play the half-bronze-dragon-halfling barbarian with the Celestial template and a Titan Bloodline
Such extreme situation I understand

If level adjustment is not an issue, then I'm playing a Titan Barbarian at First level. Gongrats on playing that little halfling rogue.
Sure, but why would a titan and a halfling know each other or even go on adventures together? I think the character would gets into a lot of problems - if the campaign isn't enterily hack n' slash.
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I know D&D should not be thinked about as a realistic game, but I still think that the diffrence in power between a titan and a human should be very clear. When I play with my group we don't metagame much and we are trying to focus on the 'roleplaying' which mean you would not get a great advantage even if you're a stonechild cleric and the other guy is a halfling rogue. I've tried to play a celestial paladin, but I didn't enjoy it as much as when I played a rogue or a wizard. Yes I was a badass fighting and healing machine which dominated the feel and any kind of undead encounters, but it wasn't fun in my opinion.