I've been a converted PVPer for probably about a month now, and for the most part I love it. I spend a lot of my time in Blackwater on Dragonknight and Nightblade (both stamina). I just wanted to share my experience so far, scope out if people share the same feelings and maybe coerce others into it.
When I first started I died. A lot. Like, so much. Coming from a PVE background you generally skill for straight out DPS, but in Cyrodiil you need to think more defensively, and also about debuffs. Think of enemy players as you would mini bosses. Once I worked this out and swapped my builds around, survival was 10x better. I've finally started getting the hang of the new resource management due to the block nerf and increased dodge rolling/break frees, so that's good too.
There's nothing more invigorating than running from keep to keep (or resource) with your team, smashing down the enemies. ESOs combat system is one of the best I've played, so this just fully enhances your experience in Cyrodiil. It's much more exciting than rounding up mobs.. trust me. PVP feels like it has turned me into a better player as well. I understand the mechanics far better than I used to.
There are a few negatives I've noticed in Blackwater. I'm not sure if they affect the vet campaigns or not.
1. People rely on siege to kill opponents. Like, I'm talking solely rely on a ballista. Today, before writing this post, the ground was fully covered in red circles. We couldn't dodge roll any where. Not only were we outnumbered, but we were greatly outsieged. I prefer proper battles and leaving the heavy artillery for the walls. this was not a lot of fun, and seems to be a regular occurrence lately.
2. When I'm online, DC is always seriously outnumbered. The pattern seems to be AD dominating, EP hiding somewhere, and DC attacking AD with no hope of success, but we do it anyway. Today a small number of EP came out of the shadows and started attacking us (DC) while we were under heavy siege fire from AD.
3. I didn't want to bring it up, but it has to be said. CPs do make a difference, if only a little. I don't find it a problem because I have over 150 of them, but I've seen frustrated newer players unable to kill 1 person because they have 100 points into Bastion. That with the damage reduction and well, I can see why people resort to sieges.
I often wondered if Craglorn would have made the perfect PVP ground, without the use of sieges. No keeps, no hidey holes, no daedra around every single corner, no giant balls of flame being heaved at you. Just PVP the good old fashioned way, but ESO style. I could be wrong, but this place just seems perfect.
Anyway, I'll continue PVPing in BWB despite its annoyances, because it can still be a lot of fun. But if we could cut back on the siege wars so I don't respawn like this every time

that'd be just great.
If you're just thinking about trying out PVP, do it. But don't quit after one fight like I've seen a few people do already. It takes practice and different way of thinking, but it's extremely beneficial (rewards, alliance skills, great experience) and just makes you feel like you're apart of something bigger instead of finding lost forks, slaying mudcrabs and talking to ghosts.
Most importantly, have fun and I'll see you in there!
P.S. I hate siege