Never noticed this in honesty.
I think he was essentially a cool guy, confident, assured, and friendly.
I guess he wasn't welcoming to Thomas Riker, but then meeting yourself to all intents and purposes is not something any human is likely to encounter. I honestly don't know how I would react to me (who got trapped on a planet in a transporter anomaly lol..) 10 years ago.
He was a good friend to Picard, Geordi, Deanna, Worf, Data, Wesley, Beverly, Guinan, etc. so he wasn't bad at all IMO.