He nodded some then chuckled a bit. "Oh I bet the old man Giles is having a grand old time researching and studying all these new baddies." Giles did love his books after all. Spike knew though the value of being informed on what you were up against after all.
He glanced at her when she mentioned that was the best wish for him and he arched a brow before shrugging. "Seemed practical. Coulda wished for that ring to make me fully invincible but sodding thing could get ripped off in a fight." He gave her a pointed look and a grin as he shoved his hands in his pockets. "This way too I still got my other vulnerabilities just in case some Seal crap happens and turns me into the big bad."
It could be argued that Spike didn't think all the time, he had admitted to such after all, but with Buffy and the Niblet here, he didn't want to hurt them if something were to make him go evil.