If I offered to do the presentation/speech at a big event and my colleagues laughed and said I loved the attention I wouldn't be offended. If my child was ill or my marriage was breaking down and someone said I loved the attention I'd be very very offended. Context makes a difference.
I would take it as a compliment, because I do like attention and I do put myself out there a lot. I'm not a drama queen, I just like to be recognised for my efforts. So yes I think it's a compliment, but if someone thinks liking attention is a bad thing they're a bit daft anyway.
It depends on the context in which it was said. Saying someone loves attention is like stating a fact or making an observation. On the other hand,saying that someone is an attention seeker can come across as an insult. My exP said this to me on several occasions when we argued. It is so not true. If he'd known anything at all about me,one thing he would have known was that I am NOT an attention seeker! I just prefer to blend in and not stand out from the crowd at all. I hate having my photo taken,and my idea of hell would be to appear on TV.