If nothing else, I'd say watch Angel because while it starts out weaker than Buffy, in my estimation it becomes the better show. And a fairly unassuming character on Buffy (perhaps more than one) really comes into their own during their time on Angel.
If you're talking about who I think you are talking about, his arc is one of my favorites in the franchise.
JirinPanthosa, are you planning on reading the post series comics after you're done with the shows? Joss is/was very involved with the Buffy ones. He wrote some Season 8 issues himself, and I believe he is "executive producer" for the entire series. I think he might have had some input on the first few storylines in the Angel comics set after the show, but I'm not sure how involved he was after that.
I'm not that into comics, but if it really concludes the storyline I don't see why I wouldn't. So long as I can get them on a format I can bring with me on a plane.
